KEY AND INDEX 



of pharmaceutical chemistry and the use of 

 drugs. It is claimed (upon doubtful authority), 

 that he introduced the use of opium and mer- 

 cury in medicine. 



Pare, Ambroise, ii, 181. Born at Laval, 

 Mayenne, France, 1517; died at Paris, Dec. 22, 

 1590. Celebrated French surgeon. One of the 

 founders of scientific surgery. Noted for his 

 discovery of a rational method of treating gun- 

 shot wounds. He introduced the use of the 

 ligature for controlling hemorrhage. 



Parmenides, i, 114. Lived about the middle 

 of the Fifth Century, B.C. Greek philosopher. 

 His writings were held in high esteem by both 

 Plato and Aristotle. 



Parsons, C. A., vi, 124. Born June 13, 1854. 

 English engineer, inventor of the practical steam 

 turbine engine. These engines have been found 

 particularly effective for the generating of elec- 

 tricity and the propulsion of war and mercantile 

 vessels. 



Pascal, Blaise, ii, 122. Born at Clermont- 

 Ferrand, Puy-de-D6me, June 19, 1623; died at 

 Paris, August 19, 1662. Celebrated French phil- 

 osopher and writer. In 1648 Pascal suggested 

 that if the theory of the pressure of the air 

 upon the mercury in a Torricellian barometer 

 was correct, it could be demonstrated by ascend- 

 ing a mountain with the mercury tube. As the 

 air was known to get progressively lighter from 

 base to summit, the height of the column should 

 be progressively lessened as the ascent was 

 made, and increase again on the descent into 

 the denser air. This experiment was made 

 shortly after this time, the rising and falling 



