No. 52557. 



Specific Gravity. Hydrometers. 



347 



52 554. 1 : 5. 



52 555. 1 : 9. 



52 548. 1 : 5. 52 553. 1 : 5. 



52 547. 1 : 5. 



52 552. 1 : 5. 



52 556. 1 : 6. 



52.549. Hydrometer, high Sensitivity Pattern, for specific gravities of 0.997, 0.998, 0.999 and a. d. 

 1.000, for measuring the density of water between and 25 C. and for showing the 

 Density Maximum 0. 15. 



52.550. Universal Hydrometer, from 0.700 to 2.000, with thermometer 0. 4. 6 



52.551. - - idem, without thermometer 0. 3. 6 



52.552. Hydrometer, for very accurately determining the sp. gravity from 0.700 to 2.000, 

 comprising 4 spindles with thermometer in elegant case, and 1 measuring jar, 

 Figure 0.18.0 



52.553. Large, Flat Hydrometer for measuring the Density of Acids, Figure, with large, 



plain black and red scale from 1.180 to 1.240 0. 3. 



The Hydrometer is quite flat in shape, thus enabling it to be immersed between the accumu- 

 lator plates of stationary batteries. The scale indicates thousandths. Not suitable for portable 

 accumulators. 



52.554. Specific Gravity Indicator, Figure, Hydrometer with glass vessel, rubber ball and 

 tubing, for conveniently determining the sp. gr. of the acid in portable accumulators 0. 7. 



If acid is sucked up by the rubber ball into the glass vessel the density of the acid can be easily 

 read off on a hydrometer contained in the vessel. 



52.555. 27 Indicators, of glass, differently loaded, Figure, each Indicator plunges into a 

 liquid when the sp. gr. of the latter is equal to that marked on the indicator (Fr. phys. 

 Techn. I, 2, Fig. 2471) 1. 0. 



The Indicators correspond to the sp. gravity of 0.7 to 2.0 in stages of 0.05. 



52.556. Sike's Hydrometer, Figure, heavily gilt, with thermometer, instructions, tables 



and comparison rule, in elegant mahogany box and with test glass 4. 10. 



52.557. Alcoholimeter, after Tralles, for 30100%, graduated in l / 2 % 0. 2. 



Cl. 766, 767, 2276, 68, 779 l , 

 768, 3645. 



