594 



Thermoscopy. 



No. 54 969 



54 969. 1 : 9. 



54 969 A. 1:8. 



54 970. 1 : 8. 



54,969. Accessories for using the Thermoscope as a Manometer (Experiments Nos. 137 157a), Fig. 54,969 

 and 54.969A 



For experiments on gas osmose, the absorption and ejection of gases, relations between carbonic 

 acid and lime water (formation of stalactites), demonstration of water content and of carbon dioxide 

 in air, vapour tension of water, alcohol and ether; buoyancy of gases, propagation of pressure, suction 

 effect of outflowing air, measurement of adhesion in capillary tubes, pressure of a liquid column, 

 demonstration of tension in soap bubbles, Newton's colour rings, porosity of clay. 



. s. (1. 

 1. 16. 



1 Porous Pot. 



1 Glass Beaker for above. 



f 2 Osmose Apparatus after Niemoller (Fig. 46 a). 

 j-2 Vessels for inserting. 

 1 1 Bell Funnel after Steinbrinck. 

 f2 spherical Capsules with constriction (Fig. 47). 



1 forked Tube (Figs. 48 and 52). 



1 multiple bent Glass Tube on stand (Fig. 54.969A) 

 (Fig. 48). 



1 Model of water air pump (Fig. 49). 



1 Vaporiser (Fig. 50). 



1 Tube for suction and pressure effects (Fig. 51). 



3 different Capillary Tubes. 



1 wide Glass Tube with point. 



1 soap-bubble Apparatus (Fig. 53). 



1 Clay Slab with funnels attached 



54.969 a. Small Collection of Accessories for using the Thermoscope as a Manometer (Experiments Nos. 137a, 

 137 b, 138 149, 157), comprising solely the items marked fin No. 54, 969, for experiments on gas osmose, 

 alisorption and ejection, tension in soap-bubbles 



11. 12. (i 



:>4.'.i7o. Accessories for various Experiments, Figure (Experiments Nos. 158 161) 



Demonstration of heat by physiological processes, proving that solutions of salts take up some 

 times a smaller and sometimes a larger space than the individual substances together, inequality of 



ililatcitinn of two liquids. 



2 Erlenmeyer Flasks with stoppers, spherical 



tubes and water bath. 



Apparatus for expansion of water on frcezinic 

 (Fig. .-,.-,). 



2 Capsules filled with shot. 



Cylindrical Vessel with tube attached. 



Stopper with glass rod and perforated reagent 



r.i.'.iTi. Accessory Apparatus for Determining the absolute Expansion of Water, Figure (Figs. 5658) 

 .".t .'.17:.'. Dew-point Finder after Looser, Figure (Experiment No. 163, Fig. 59) . 



Boxes and Stands for taking the various accessories are prepared on application and chained 

 at lowest possible cost. \Ve would ask in this ease that the collections of accessories 

 should he mentioned which are to he placed in boxes or on stands. 



. .v>09, 



6197. 



i. 10. 

 o. to. II 



