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Technical:Unclassified

9/9/2010 16:18:03 MST

21074 $49.99 More Info/Order	Cell R. S. A. Signal Cell Maker: Thomas A. Edison, Inc.. Labeled 'Primary Battery'. Glass cell with porcelain lid. Approx. 7 in. diameter by 10 in. tall.	Condition: Excellent. Some discoloration on the lid and minor scratches on the glass. Several imperfections in the glass which we believe were manufacturing flaws typical of the period. Overall, a very nice example.. Number of items available: 1 Ship weight: 11.01 lbs.
17673 $75.00 More Info/Order	Check imprinter Model S Maker: Safe-Guard. Later models are everywhere but this one has real character. Latest patent date is 1918. Stainless steel and black lacquered metal parts give it real eye appeal	Condition: very good. Painted surfaces have a few chips here and there and the entire unit could stand some polish. Overall, this is an outstanding example of early American business technology.. Number of items available: 1 Ship weight: 1.01 lbs.
18476 $99.99 More Info/Order	Compass Eng. Dept. USA 1918 Maker: Usanite. Pat'd April 20, 1915, this wonderful little item resembles a pocket watch. Approx. 1 3/4 in. diameter.	Condition: very good. Each side has one small dent and there is minor wear from normal use. Underside of glass has significant deposits which may or may not clean off.. Number of items available: 1 Ship weight: 0.35 lbs.
17875 $29.99 More Info/Order	Compass Model 4052 Maho D.R.P. Maker: Tacro, Inc.. A wonderful example of German precision, this chromed compass can be used for drawing very small, precise circles utilizing a unique design.	Condition: Excellent. Other than a few areas of wear on the case, this item is as New.. Number of items available: 1 Ship weight: 0.35 lbs.
19460 $34.99 More Info/Order	Drafting Set A. Lietz Maker: Unknown. A nice older set of large compass and divider with appropriate extensions, small compasses for pencil or ink, ink pen and lead storage tin. In a plush-lined, fitted case marked 'Switzerland' with a metal tag marked 'A. Lietz San Francisco, USA'	Condition: very good. Case exterior is shabby/tattered but all instruments are in excellent condition (require polish to look great). All items are marked with the logo shown in the picture. The maker was probably Charvoz Roos but Lietz obviously marketed the set.. Number of items available: 1 Ship weight: 1.00 lbs.
21258 $39.99 More Info/Order	Galvanometer Wooden Case Catalog/Model No.: 3434 Maker: Honeywell/Rubicon. An early electrical test apparatus. Needle position is projected onto a translucent glass panel upon which graduations are etched. 6 VDC power req'd. Certification tags dated 1962. Sens.= .0006.	Condition: Excellent. Great cosmetics but operation is untested and not guaranteed. Missing the rubber feet which deteriorated with age. Picture is typical.. Number of items available: 1 Ship weight: 10.00 lbs.
21257 $39.99 More Info/Order	Galvanometer Wooden Case Catalog/Model No.: 3431 Maker: Honeywell/Rubicon. An early electrical test apparatus. Needle position is projected onto a translucent glass panel upon which graduations are etched. 6 VDC power req'd. Rubicon Certification tag dated 1962. Sens.= .01.	Condition: Excellent. Great cosmetics but operation is untested and not guaranteed. Bears a stenciled 'Met.E' and a decal 'College of Mines'. Missing the rubber feet which deteriorated with age. Picture is typical.. Number of items available: 1 Ship weight: 10.00 lbs.
20497 $79.99 More Info/Order	Galvanometer Wooden Case Catalog/Model No.: 3581 Maker: Rubicon. A gorgeous example of an early electrical test apparatus. Needle position is projected onto a translucent glass panel upon which graduations are etched. 6 VDC powers the lamp. 9-1/2 in. by 7 in. by 7 in.	Condition: Very Good. Nice cosmetics but there is a small chunk of wood missing from the front/bottom of the lid and some stains in the wood finish. Maker's tag on front is barely legible. Operation is untested and not guaranteed.. Number of items available: 1 Ship weight: 10.00 lbs.
7670 $45.00 More Info/Order	Hearing Aid Radio Ear Maker: Unknown. Black sheet metal construction, C cell battery compartment topped with a receiver that resembles a telephone earpiece, then a volume control on the very top. Overall, it's 7 inX2inX1in. The earpiece is attached via fabric-covered twisted pair wire	Condition: Excellent. Unknown operation but it looks like new.. Number of items available: 1 Ship weight: 1.00 lbs.
23809 $24.99 More Info/Order	Learning Aid SCI Planet Tracker Maker: Spherical Concepts. Here's a high-quality astronomical device useful for learning about our solar system. An acrylic disc, stand, 7 planets, a marking pencil and an instruction manual make up an effective kit.	Condition: Excellent. Manual has minor soil on the front cover and the pencil is broken. Otherwise, the set appears as new.. Number of items available: 1 Ship weight: 1.85 lbs.
38752 $99.99 More Info/Order	Microscope Projecting Catalog/Model No.: TRIG K-1 Maker: Ken-A-Vision. A wonderful teaching tool that permits microscopy without squinting. Throws a bright image from a slide onto a screen or base. Finger-tip focusing, swing in/out 10x auxiliary lens or filter. A mirror and lens on a turret provide function selection.	Condition: Excellent. Looks good and works very well but could use some more cleaning. Number of items available: 1 Ship weight: 21.00 lbs.
46950 $9.99 More Info/Order	Model Kit Molecular Visions Catalog/Model No.: ISBN-10: 0964883716 Maker: Darling Models. Year: 1996. Artist: Darling, Stephen D.. Organic Inorganic Organometallic Molecular Model Kit #1 to Accompany Organic Chemistry) by Carey, Francis A.	Condition: Excellent. Looks good. Appears complete but we can't guarantee it is because an inventory of the parts originally with it is not included. Number of items available: 1 Ship weight: 1.10 lbs.
22901 $19.99 More Info/Order	Optics Kit Model 1900 Maker: Macalaster Scientific. A kit designed for use with a laboratory guide (not included). Can also be used to make a telescope, a simple microscope or a view camera. See Assembly Guide below for contents.	Condition: good. Missing the cement, protractor, spherical mirror and one of the larger lenses.. Number of items available: 1 Ship weight: 2.00 lbs.
19346 $75.00 More Info/Order	Scale/Protractor Ivory Maker: Unknown. A beautiful and ancient example of technology. Approx. 6 in. long by 1 3/4 in. wide. One side has protractor markings on the perimeter and 5 scales on the interior. The obverse has 8 scales which we assume are for proportional drawing.	Condition: very good. A horizontal split extends from the middle of one edge for approx. 2 in. and another extends for about 1/2 in. above it. Numerous scratches show this item's age and that it was used. A nice yellowed patina adds to its appeal.. Number of items available: 1 Ship weight: 0.50 lbs.
18809 $19.99 More Info/Order	Science Kit Color Spectroscope Lab Maker: Science materials Center. Year: 1958. A wonderful educational kit ( for ages 10-16) which includes: a spectroscope tube; diffraction grating material; colored plastic and associated materials; a 16 page manual.	Condition: very good. A few of the plastic film pieces are a little ragged around the edges.. Number of items available: 1 Ship weight: 1.01 lbs.
19752 $29.99 More Info/Order	Science Kits Science Discoveries Maker: Pickett. A wonderful series of 9 kits designed for ages 5-15 years. Topics include: Magnetism, chemistry of matter, growing crystals, measuring heat energy, rocks of the earth, solar spectrum, electromagnetic force and others	Condition: Excellent. All appear complete and seldom, if ever, used.. Number of items available: 1 Ship weight: 1.01 lbs.
26146 $14.99 More Info/Order	T-Square Stainless 18 inch Maker: Pickett. If we need to explain this device to you, then you don't need it! Otherwise, it's a nice-looking functional drawing tool.	Condition: very good. Has some scratches and paint (or crayon) residue but looks like it may polish out and look good again with some effort. Appears to be straight but we have no accurate means for measurement.. Number of items available: 1 Ship weight: 2.01 lbs.
23457 $49.99 More Info/Order	Test Kit Maker: Chicago Aerial Industries. An impressive kit, apparently designed for testing pressure transducers. A brass Chatillion 0-32 ounce scale and Magnehelic Gauge (0-8 Ounces and 0-15 Inches of water) are the primary instruments.	Condition: Excellent. Appears unused.. Number of items available: 1 Ship weight: 7.10 lbs.
26960 $49.99 More Info/Order	Thermometer Pocket Dial in case Maker: Taylor. A beautiful little unit designed for field use. Mounted in a fitted leatherette zippered case. Approx. 3 inch square by 1 inch thick. 20-120 deg. F range limits it to its intended use as a 'Room Thermometer'.	Condition: very good. Lens is slightly cloudy and the zipper is a little hard to operate but overall a very nice item in presentable condition.. Number of items available: 1 Ship weight: 0.30 lbs.
21625 $29.99 More Info/Order	Tool Impactor Maker: Dudley Research. Pat No. 1817571 puts this in the 1931 time frame. An impressive looking tool approx. 7 inches long with a stand for it and several interchangeable tips. Apparently a dental tool but the bits are very aggressive looking!	Condition: good. Some plating loss on the tool and stand. Corrosion on tips. Tip holder does not rotate with input shaft, making us think the slide on the side may be a clutch of sorts but we are unable to move it.. Number of items available: 1 Ship weight: 2.00 lbs.

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