Instruments & Innovation

Figure 14 from the 1915 volume, The Rare Earth Industry depicting a machine (1/10 actual size) for saturating cotton and ramie webs with a solution of rare earth metals during the manufacture of gas mantles. The volume…

Illustration of an apparatus used to manufacture soda water.

Illustration depicting the manufacture of seltzer or soda water by use of a wheel to force gas into bottled water.

Figure 20 from the 1915 volume The Rare Earth Industry depicting a machine for trimming upright mantles, a component of incandescent gas lanterns. The volume details various industrial applications of rare earths and…

Catalog of laboratory instruments for the physical sciences. "Both our own manufacture and that of reliable foreign makers. Especially adapted for use in universities and colleges." Index starts on page 175.

Two vacuum distillation apparatuses with various components, including distillation flasks, thermometers, heating baths, vacuum tubes, as well as stands and clamps.

Vacuum distillation is a method of distilling at…

B 2040. Differential tensimeter.
B 2041. Storage rack with circular section for tensimeter.
B 2052. Stirring device, mechanically operated by clockwork.
B 2057. Reading device for thermometer.
B 2060. Complete apparatus…

B 4919. Water sampling apparatus, with bottles and tube for chemical, gas, and bacteriological analysis.
B 4921. For removing river or seawater.
B 4922. Flow-through water sampler suitable for all depths.
B 4923. Winch…

Ernst Leitz Wetzlar electric heating microscope stage warmers.

Microtomes are used for cutting tissues into extremely thin sections, for preparation of samples in microscopy.

B 5255. Sledge microtome for anatomical and bacteriological work.
B 5261. Microtome with crank for all…

Microtomes are used for cutting tissues into extremely thin sections, for preparation of samples in microscopy.

Microscope with achromatic objectives and Huygens eyepieces. Assembled with the "No. 2b" stand, for medium microscopes with lighting unit.

Microscope with achromatic objectives. Assembled with the "No. 1" stand, for large microscopes.

Oil immersion microscopes with various components and of different sizes.

Two microscopes with choices of various components for complete assembly.

B 5095. Sufficient for most bacteriological, histological, botanical, and zoological investigations.
B 5099. For bacteriological work (equipment…

Polarimeters are used to measure the angle of rotation of a beam of light passing through an optically active substance.

B 2282. Electrometer for radioactive measurements.
B 2285. Fontactoscope, an electroscope for measuring the radioactivity of water and gases.
B 2300. Electrometer with internal amber insulation.

B 2106. Precision apparatus for determining freezing point depression.
B 2107. For determining freezing point depression for clinical purposes.
B 2108. For determining freezing point depression for very small…

B 185. Combination water distillation unit with drying cabinet and sand bath for gas heating.

Also pictured are evaporating flask and dishes made of glass and metal.

Portable universal respiration apparatus, according to specifications from Professor Francis Gano Benedict.

B 181. Automatic, for gas heating, coal or wood firing.
B 183. Fully automatic, with copper interior and steam heating.