Specific Gravity. Propagation of Pressure. Pressure-Measurements on Gases. 



369 



52739. 1 : 18. 



52742. 1:8. 



52743. 1 : 8. 



52 744. 1 : 6. 



52.737. Sensitive Syphon Pressure Gauge, after Grimsehl, based on the difference in the 

 specific gravity of two liquids (Ztschr. f. d. phys. u. chem. U. 18, 1905, p. 199, Fig. 1) 



25.738. Duplex Pressure Gauge, after Priedr. C. G. Miiller (M. T., Pig. 66), a syphon pressure 

 gauge for two liquids, for different ranges; can be used aerostatically and hydrostatically 



52.739. Open Mercurial Pressure Gauge for 2 atm., Figure, on board with graduation. 



52.740. --idem, for 3 atm 



52.741. Closed Mercurial Pressure Gauge, cf. Pig. 52,742, to 12 atm., with silvered graduation, 

 with lateral tube supports with cock 



52.742. --idem, Figure, without cock 



52.743. Mercurial Vacuum Gauge, Figure, with 3-way cock, on polished board, with 

 silvered metal scale 



52.744. Recording Pressure Gauge, Figure, for indicating and recording from 20 kg 

 per sq. cm 



When ordering please state whether the records are required to be made with hygroscopic ink 

 or with lead pencil and whether the cylinder has to make a revolution once in 24 or once in 12 hours. 



.vjTi.v 400 Pieces Paper Strip for above 



Prices for Micromanometers quoted on application. 



Cl. 816, 5099, 5901,5902. 



S. d. 

 0.18.0 



0.16.0 



1. 0.0 



2. 0.0 



2. 6.0 

 2. 0.0 



2. 2.0 

 12. 0. 



0. 18. 

 24 



