RETORT, Pyrex Glass—With ground-in Pyrex Stopper. RETORT, Iron—Nevada pattern. Oval top with iron delivery pipe. Ground-in cover. This type offers a distinct advantage over the old type

RADIOSCOPE—An instrument for detecting the presence of radio-activity in waters, ores, etc. by the scintillation method. Any material containing radium constantly throws off emanations which will

  RESPIRATOR, Automatic, Braun—Wet sponge type. Protects the throat and lungs from dust, poisonous gases and all other impurities. Persons engaged in dry crushing, grinding,

    PIPETTE, Medicine Dropper—Straight tip; with cork shaped rubber bulb. PIPETTE, Medicine Dropper—Straight tip; with rubber bulb. PIPETTE, Medicine Dropper—Curved tip; with rubber bulb.

PAN, Gold Washing, Miner’s—Made of polished copper. Diameter 16 inches. PAN, Gold Washing, Miner’s—Made of polished steel. With rolled edges. PAN, Gold Washing, Miner’s—Similar but

Muffles MUFFLE, Clay—Colorado make. Muffles should always be ordered by letter, as, on account of small difference in the size of many muffles, description by

MOLD, Bullion or Ingot, Iron-Inside dimensions 1x1x3½ inches. Capacity 20 ounces in gold ; 10 ounces in silver. MOLD, Bullion or Ingot, Iron-With sliding bar

Packed in carton about 8x10x1¾ inches. MINERAL COLLECTION, Diamond—The specimens average about an inch through and each is in a separate partition. Each specimen bears

MAGNIFIER, Coddington—First quality. Mounted in nickeled folding case. MAGNIFIER, Doublet—Composed of two piano convex lenses, set in nickeled folding case. MAGNIFIER—In nickeled metal folding case.

Multiple Unit Electric Hot Plates HOT PLATE, Electric, Multiple Unit, Improved-Provided with three snap switches mounted on the base each of which controls one of three