THE ANALYST. I known, and the more granular naturz of the cement facilitated manipulation. I n the original form the lower bulb had a capacity of about 1,500 grains and that of the upper bulb exactly 1,000 grains water measure at normal temperature. 79 A MODIFIED KEATES’ SPECIFIC GRAVITY BOTTLE FOR CEMENT TESTING, ETC. BY W. J. DIBDIN, F.I.C. the introduction of the cement and subsequent cleansing, the constriction between the two bulbs, I~IUDIS-KEATES BOTTLE. as well as the neck of the bottle, was enlarged. .In its present form the lower bulb has a capacity of 75 C.C. and the upper 25 c.c., the diameter of the neck and con-80 THE ANALYST. striction being 12 mm. The effect of this modification is such that the finest cements are easily manipulated, whilst the advantages of the original form are unimpaired. + * * 45 4-