769 



Preston salt, 269 

 Principle of Archimedes, 34 

 Prismatic spectrum, 59 

 Prisms, 58 



Nicol's, 65 

 Pro-enzymes, 638 

 Prolamines, 628 

 Proof-spirit, 484 

 Propylamine, 620 

 Protagon, 670 

 Protalbumoses, 632 

 Protamines, 629 

 Protargol, 334 

 Proteans, 631 

 Proteases, 637 

 Proteids. See Proteins. 

 Proteins, 623 



alcohol-soluble, 628 



classification of, 624 



coagulated, 632 



conjugated, 629 



decomposition products, 633 



derived, 631 



simple, 625 

 Proteolysis, 633 

 Proteoses, 632 

 Prussian blue, 554 

 Prussiate of potash, red, 555 



yellow, 554 

 Ptomaines, 617 

 Ptyalin, 673 

 Purine bases, 667 

 Putrefaction, 555 

 Pycnometers, 34 

 Pyocyanine, 620 

 Pyramidon, 592 

 Pyridine, 592 

 Pyrites, 293 

 Pyrocatechin, 575 



tests for, in urine, 723 

 Pyrogallol, 576 

 Pyrolusite, 303 

 Pyroxylin, 537 

 Pyrozone, 155 

 Pyrrol, 590 



tetra-iodo, 590 



Q 



QUANTIVALENCE, 102 



Quartation of gold, 365 

 Quartz, 186 

 Quick-lime, 277 

 Quicksilver, 335 

 Quinidine, 609 

 Quinine, 608 



salts, 608 

 Quinol, 576 

 Quinoline, 593 



iso-, 593 



R. 



RADIATION of heat, 50 

 Radical, compound, 122 

 definition of, 122, 448 



49 



Radio-activity, 84 

 Radium, 84, 284 



bromide and chloride, 285 

 Raoult's freezing-point method, 161 

 Rays, Becquerel, 84 



cathode, 83 



of heat, 50 



of light, 57 



Rontgen, 83 



Reaction, reversible, 114 

 Reagents, list of, 374 



use of, in analysis, 376 

 Realgar, 347 



Reaumur thermometer, 46 

 Receptors, 662 

 Recording thermometers, 47 

 Red lead, 320 



prussiate of potash, 555 

 Reduced iron, 295 

 Reducing agents, 147 

 Reduction, 147 

 Reflection of light, 57 

 Refraction, double, 63 



of light, 58 

 Reinsch's test, 353 

 Rennin, 673 



Residue, definition of, 122 

 Resins, 599 



gum-, 599 



oleo-, 599 

 Resopyrine, 592 

 Resorcin, 576 

 Resorcinol, 576 



-phthalein, 582 

 Respiration, 647 

 Reticulin, 629 

 Reversed spectra, 62 

 Reversible actions, 114 

 Reversion, 533 

 Rhigolene, 468 



Rideal-Walker coefficient, 570 

 Rigor mortis, 665 

 Rochelle salt, 515 

 Rock, phosphatic, 280 

 Rodagen, 669 

 Rontgen rays, 83 

 Rosaniline, 565 

 Rosin, 599 

 Rosolic acid, 410 

 Rouge, 296 

 Rubber, 597 



preservation, 598 



vulcanized, 597 

 Rubidium, 267 



salts, 268 

 Ruby, 286 

 Ruhmkorf coil, 79 

 Rum, 486 



SACCHARIN, 580 



soluble, 581 



Saccharinol, 581 



