

IV. VOLUME. 63 



shape of a hollow truncated cone, weighing 14 Ibs. 10 oz. 1 dr. 18 grs. 

 Scottish troy. Diam. of mouth 4.17 English in., of the bottom 5.25 in., and 

 depth 6 in. On the front, near the mouth, is a shield in relief, bearing a 

 lion rampant, the Scottish national arms, near the bottom is another, bearing 

 an ape passant gardant, supposed to be the arms of the foreign maker. 



324a. Russian Standard Measures of Capacity (Vedro, 



V., i V., T V V., -rfo. V.). Siemens and Halske, Berlin. 



These measures, made of bronze, have a coni- 

 cal shape, newly adopted in Enssia, for standard 

 and trade measures of capacity. In these mea- 

 sures the inner diameter, A B, of the bottom 

 is equal to an inner side, A C, and double 

 diameter, C D, of the orifice. By very sim- 

 ple contrivance, such trade measures might 

 be verified, approximately, by (linear) mea- 

 surement of A B, A C, and C D. 



325. Set of Standard Measures for Alcohol, conical 

 shaped, in order to diminish the possibility of evaporation of the 

 liquid. Siemens and Halske, Berlin. 



326. Water-meter, for cold water, for 26 mm. width of 

 tube. Dreyer, Rosenkranz, and Droop, Hanover. 



327. Water-meter, for domestic use. 



Dreyer, Rosenhranz, and Droop, Hanover. 



32 7a. Patent Water Gauge for steam boilers, independent 

 of level or distance. John Nicholas. 



This instrument is for indicating in an office or ship's cabin the quantity of 

 water in the boiler or other vessel to which it is attached. The boiler may 

 be any distance from the office, and upon any relative level. The small tank 

 represents a portion of a boiler to which the stand pipe is attached ; in the 

 centre of the stand pipe is a brass tube, open at the top into the steam space, 

 and communicating at the bottom with the right-hand union. The left-hand 

 union opens directly into the water space. The right-hand union is connected 

 by a lead pipe with the top part of the gauge glass, the other by a similar 

 tube with the bottom of the glass, forming a continuous tube, one end of which 

 is open to the steam and the other to the water space. This system is now 

 entirely filled with water, which will always have the same level inside the 

 brass tube as in the boiler, and any movement in the boiler will cause a 

 corresponding motion in the brass tube, such movement being continuous 

 throughout the system. A small quantity of oil is placed in the gauge to 

 show readily this movement, and the line of contact in the glass tube repre- 

 sents the position of the water in the boiler. 



327b. Patent Indicator, for tanks or reservoirs. 



John Nicholas. 



This gauge is similar to that last described, but the atmosphere giving 

 comparatively a constant pressure the stand pipe can be dispensed with. 

 The brass tube referred to in the previous description may be seen in the tan 



