Category: science kits

Monday, 12 May 2014

10:01 – Yesterday, of course, was very hard for Barbara, as it was her first Mother’s Day without her mom. We did a Costco run and dinner with Mary and Paul. Neither we nor they actually needed much at Costco, but I think it did Barbara good to see them and relax over dinner.

Kit sales remain very slow, although we’re building like crazy. Come July, August, and September, things will reverse. We’ll be shipping kits much faster than we can build them. We’re in pretty good shape on component inventory, so for now I’m concentrating on bottling chemicals that have long shelf lives.


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Sunday, 11 May 2014

07:59 – Once again, USPS didn’t bother to show up. Fortunately, I had only one kit sitting waiting for pickup yesterday, so I’ll only have to send one email to apologize for the shipping delay. I will email our congressman tomorrow to complain. That’s seven days so far this year that USPS has skipped our route for no reason. Our local postmaster should be fired.


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Thursday, 8 May 2014

08:21 – Barbara is taking the day off work to take Colin to his annual vet checkup, run errands, and catch up on some stuff at home. I’m still filling bottles, hundreds and hundreds of them, for science kits.

The morning paper reports that the results of the nationwide assessment of 12th graders has only three-eighths of them proficient or better in reading and about a quarter proficient or better in math. Those figures are bad enough, but what goes unmentioned is that the bar for “proficient” is set extremely low. By any reasonable yardstick, the sorry truth is that probably at most 5% to 10% perform at what would historically have been considered a 12th grade level. Is it any wonder that private schools and homeschooling are booming?

On a related note, I see that fast-food employees are planning protests in 150 cities on 15 May to demand an increase in the minimum wage to $15/hour. Give me a break. The vast majority of them aren’t even worth the $9/hour that they currently average.

As the articles always point out, $9/hour is about $18,000/year, which is $4,500/year below the poverty line for a family of four. The articles never point out that if both parents in that family of four flip burgers at McDonalds, the family income is $36,000/year, which is $13,500 above the poverty line. Apparently, we’re supposed to think that Ozzie should be able to support his family flipping burgers while Harriet is a stay-at-home mom.


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Wednesday, 7 May 2014

07:50 – Barbara is on a day-trip today with her friend Bonnie Richardson. Bonnie got here about 7:00, and they left to drive to Greensboro, where they’ll catch the train to Raleigh. They’ll return sometime this evening.

I’m still filling bottles. This weekend we’ll start making up chemical bags for 90 biology kits and 120 chemistry kits.


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Saturday, 3 May 2014

09:12 – Barbara is off to finish cleaning out her mom’s apartment. We hope she’ll be able to finish today and have done with it. She and Frances have already given away their mom’s clothes and most of the furniture, so what remains is mostly small items.

We’re now in good shape on bottles and caps, but I just realized that I somehow got out of sync on the two. Our vendor sells bottles by the case, but the number of bottles per case varies from 160 to 1,500, depending on the size and type of bottle. The caps, on the other hand, are always sold ten gross per case. As it turns out, I now have many more 15 mL plastic bottles than I have caps for them, so I need to place another order for a case of those bottles and two cases of caps. That’ll bring our total inventory of those bottles and their caps into close agreement.


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Friday, 2 May 2014

09:34 – Last month was our worst month for kit sales in more than a year. I’m not too worried. These things fluctuate, and we’re still running something like 160% of last year’s sales through April.

I’m still filling labeled bottles, and I’ve managed to cut the backlog down to less than 2,000, or roughly 60 kits’ worth. Of course, UPS delivered several thousand bottles yesterday, so Barbara will soon be building up that backlog again.

I decided to re-read all of R. Austin Freeman’s mysteries, which I last read about 50 years ago. Many have compared Freeman to Doyle and Christie, but in my opinion Freeman is better. His protagonist, Doctor John Evelyn Thorndyke, is what today would be called a forensic scientist, a fictional close contemporary of the great Sir Bernard Spilsbury.

But, unlike Doyle and Christie, Freeman wrote from direct experience. Thorndyke’s fictional laboratory is a more-or-less exact representation of Freeman’s actual laboratory. When Thorndyke performs forensic test procedures, he is merely reproducing what Freeman actually did in his own lab as he was writing the story. And Freeman “plays fair” with the reader, assuming that the reader has a great deal of arcane forensics knowledge.

I’d started to explore forensic science in detail by the time I was in sixth grade. Our librarian knew my interests, and one day she handed me a book and said she thought I’d really like it. It was Freeman’s The Red Thumb Mark, the first of his novels published under his own name, and she was right. When I returned it the next week, she asked if I’d figured it out. I told her that I had figured it out very early in the book, and that literally one word had given it all away. As soon as I saw that one word, I knew exactly who had done it and how it had been done.

So I read the rest of Freeman’s novels and short stories as fast as the librarian was able to get them for me. I figured most of them out early, because Freeman always told his readers early everything they needed to know to figure out the mystery (or, with his “inverted mysteries”, everything they needed to know to figure out how to do it). To figure things out often required some serious research. We didn’t have Wikipedia back then, so I often found myself delving deep into technical tomes about alkaloid poisons and so on. And what I found always confirmed that what Freeman wrote about forensic procedures was an accurate reflection of the state of forensic science in the early 20th century.

If you want to give Freeman a try, I recommend that you start with The Red Thumb Mark. It, as well as the rest of Freeman’s Thorndyke novels and short stories, are readily available free or at very low cost in e-book form. Amazon’s Kindle store has many of them free or for $0.99.


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Thursday, 1 May 2014

08:45 – This is pretty disturbing. I just read a news story about a man who committed a crime, was sentenced by the judge, served his sentence and was released upon completing it, and has now been hauled back into court to be re-sentenced to a longer term for the same crime. Seems to me that the government had its shot, didn’t like the results, and now has gone back for what amounts to double jeopardy. The case, of course, is the teacher in Montana who was sentenced to a 30-day term for statutory rape of a 14-year-old girl who was his student. From the judge’s comments, it’s pretty clear that he thought the girl initiated things and was “older than her chronological age”. Complicating matters is that the girl killed herself while the teacher was awaiting trial. Whether or not one believes that the 30-day sentence was too short, the fact is that the government had its chance, and going back for a second bite at the apple is simply unacceptable. If the government wants to go after someone, they should go after the judge who decided the sentence.

We were running short of bottles and caps, but UPS is supposed to show up today with about 8,000 of them. I’ll be making up chemicals and filling and capping bottles, trying to cut down on the backlog of labeled bottles before Barbara starts labeling the ones that arrive today.


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Wednesday, 30 April 2014

08:45 – Imagine my surprise the other night when I fired up Netflix streaming and was presented with a screen of legal jargon. The icons below the boilerplate offered only two options: “Accept” or “Email me a copy”. So I emailed myself a copy, and was then down to one option: Accept. Whatever happened to decline?

As I was about to click Accept–since there was no other choice–I noticed that I did indeed have another option. I could view the next screen of the contract. I was on screen 1. Of 102 screens! I clicked through the first few screens and got the general sense that (a) Netflix isn’t liable for anything, (b) that we can use the “service” only by doing exactly what Netflix says we’re allowed to do, and (c) that we’re under no circumstances allowed to sue Netflix. By this time, Barbara was getting impatient, so I just clicked on accept.

I can’t believe that Netflix lawyers actually think this “contract” would be enforceable, particularly since they don’t (as Microsoft does) force you to scroll all the way through the whole thing before you can accept it. My guess is that about 99.999% of Netflix streaming customers (including attorneys…) will simply click accept at the first screen. In no way does that constitute a meeting of the minds. Unconscionable, more like. What was Reed Hastings thinking?


12:15 – I had a kit to ship to an APO address this morning. I’d never done that with the Stamps.com software, so I decided to give it a try with USPS Click-N-Ship, not really expecting it to work. It worked, accepting my credit card as though there’d never been a problem.

I’m still making up solutions and filling bottles. I have everything I need to build another two or three dozen each of the biology and chemistry kits, so it’s just a matter of getting them assembled. I want to go into June with at least 60 biology kits and 90 chemistry kits ready to ship, and into July with at least the same number in finished-goods inventory. That means we’re going to have to label and fill thousands of bottles and build quite a few kits between now and then.

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Tuesday, 29 April 2014

10:05 – Among other things yesterday, I filled and capped several hundred bottles for biology kits. I’ll do several hundred more today.

First up is Seliwanoff’s Reagent Part A, which is simply a dilute solution of resorcinol (AKA 1,3-dihydroxybenzene or m-dihydroxybenzene). I had two liters made up, but I didn’t like the looks of it. When I made it up some time ago, it was colorless, indiscernible from water. It now has a very pale tan cast. Upon reflection, I realized that the other two isomers of this chemical, 1,3-dihydroxybenzene (AKA catechol or pyrocatechol) and 1,4-dihydroxybenzene (AKA hydroquinone), are both used in developers for silver halide black-and-white film and paper. As anyone who’s done black-and-white darkroom processing will remember, film and paper developers oxidize and turn brown as they age.

So I did a quick check and found that the Seliwanoff test worked properly with the tannish solution. Still, better safe than sorry, so I disposed of the aging solution and made up fresh.


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Monday, 28 April 2014

08:01 – Barbara is headed back to work this morning, after being off for a week. That means Colin is likely to be a bit demonic today, expecting more attention than I’ll be able to give him. I’ll be working on filling the backlog of labeled bottles, starting with ones for biology kits. Costco shipped the second identical Core i3 laptop to me this morning. I’ll be a lot happier when it’s here and set up to produce shipping labels.

I guess I’m just not as interesting as I used to be. Over the weekend, I happened across some archived web site stats, so I compared them to my current ones. Nowadays, 1,000 page reads per day is a pretty good day, and I seldom have more than 1,200 per day. Ten years ago, a good day was 10,000 to 15,000 page reads, and my heaviest days were routinely over 20,000 page reads. Making matters worse, now each day is its own page, while back then I had an entire week’s entries on one page. I conclude that my audience now is maybe 5% of what it was back then. Oh, well. As I’ve said before, I write my journal for me. If anyone else chooses to read it, fine. But I really don’t care how many people read it.


10:45 – Yuck. I just realized that among the biology kit chemical bottles I need to fill are 90 each of glyercol and 1.5% methylcellulose, two of my least-favorite chemicals to fill. The problem is that they’re both extremely viscous. That means they’re difficult to fill bottles with. Using my automated dispensers is difficult because it’s a struggle both to fill the dispensing chamber on the upstroke and to dispense into the bottles on the downstroke. At times, I’ve tried filling manually, but the problem with that is that I’m using narrow-mouth 15 mL bottles and the glycerol or methylcellulose tends to blurp over the mouth and run down the sides.

With glycerol, I can at least heat it before filling the bottles. The viscosity of glycerol at 50C is about one tenth what it is at 20C, albeit still about 200 times the viscosity of water. Methylcellulose, conversely, actually becomes more viscous as the temperature increases. There’s no point to cooling it, because the viscosity is essentially level from room temperature down to the freezing point.

Every time I have to fill glycerol and methylcellulose bottles, I swear that next time I’ll use 30 mL bottles instead of 15 mL bottles. The mouth of a 30 mL bottle is enough wider than that of a 15 mL that it’s much easier to fill manually. But I always forget, so this time I’ve gone out and noted that in the procedures list while I’m thinking about it.

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