. Journal. in. long and \ inch internaldiameter, thickened at the top and bottom so as to takethreads for the collar c, holding tho thermometer andthe base d holding the cap. c has a J- in. hole throughthe centre, into which the thermometer is sealed ; d is anordinary service cap chamber in steel with an octagonalcollar g for a wrench, and with parts of the rim filed awayon opposite sides. Through the side collar e is fastened. Fig. 4. SECTION—fl o{ t rfer s/xznne a. leadtvasktr lead yvasher

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882