Dating vintage mail order patterns
Laboratory R-C-L Devices, Diagometers & Test Kits, RF Signal Generators, Freq Measuring Instruments, AF Oscillators, Voltage Measuring Instruments, C-L-R-Z-Q Measuring Instruments, Vacuum Tube Testers, Oscilloscopes, Panadapters, Xmtr Modulation Monitors, Digital V & F Measuring Instruments, Test Bench Power Supplies, Variable Voltage Xmfrs, Miscellaneous Instruments Test instruments that are built to a high-quality standard are generally referred to as "Laboratory Equipment." Some of the test equipment used in early laboratories may seem archaic and useless today but their purpose and operation is interesting and historically important.
Some of the test and monitoring equipment for the military was the best that could be produced at the time and no expense was spared in its construction.
Otto Wolff, from 1900 to 1909, produced the Reichsanstalt-type of resistance standards used at the National Bureau of Standards (NBS.) At the turn of the last century, many precision measurements had to be calculated because the measurement couldn't be made directly since many of the instruments we take for granted today hadn't been developed.
A known precision resistance allowed one part of the equation to be selected and the remainder was then calculated.
The website claims that 95 per cent of people can't find him - are you among the five per cent who can?
Even then, 49 per cent said that they weren't able to find him, and had to look at the reveal for it to all become clear.
I can't find any chews or vinyl damage, just faint "close up" speckles to centre of forehead (minor) and "bruise" to top of right leg. 1960s Vintage Palitoy Tressy Sister "Toots" Doll (Blonde) - Hard to find 1960s Palitoy Tressy Sister "Toots" vintage teenage fashion doll complete with original Toots "Kitchen Cutie" dress, knickers and sweet little Poodle on lead! 9.5 inches in height, Toots has side glancing blue eyes, full head of blonde hair (a few plugs to lower row unpierced from factory). No chews or split knees, strong sitting click and excellent pose to limbs. Kimono has light playwear and no belt, one shoe has a split.
I had graduated from college with a degree in magazine journalism, and my hopes were to climb the ranks of publishing to work in the fashion department of a women’s magazine.
At the budget-built end, there were the countless test-gadgets intended for radio repairmen or radio hobbyists that might seem to barely be able to perform the intended task but clever designs sometimes resulted in very useful test instruments.
The following is a sample of some of the very best laboratory-quality vintage test instruments and also some test equipment from the other end of the price spectrum - H.
It might look as though there are only three boys in the photo below, but there are in fact seven - and the hidden friends are all enjoying a crafty cigarette.
Another hidden image puzzle, posted by Playbuzz, has managed to frustrate a lot of people.
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Rogers Nov, 2014 These two precision resistance boxes were built in Berlin by Otto Wolff and date from around 1900. Biddle of Philadelphia imported these instruments and each box has his tag attached.