388 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
systematically study tlie effect of pressure on certain tissues and organs. 
A strong wooden frame which is fastened to the floor by screws, carries 
a board which can move about a horizontal axis, so that it can be adjusted 
either vertically (as in the figure) or horizontally. To this board is 
screwed the hydraulic press made of phosphor-bronze, at the lower end of 
which is seen the wheel with the pressure screw (310 mm. long). Above 
this is the piston, the press-cylinder with thick walls, and the strong 
17 g. 72 . 
cover with four screws (these three parts are together 355 mm. long) 
surmounted by the manometer which is adjusted up to 2000 atmospheres. 
The total weight of the whole apparatus amounts to 60 kg. 
To use the instrument, the four screws of the cover are loosened with 
the long spanner seen in the figure, the bolts removed and the cover 
with the manometer taken off. The space (38 mm. in diameter and 179 
mm. long) is then filled with water up to the brim. The cover is 
replaced with the cylindrical projecting piece (11 mm. high and 56 mm. 
