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Page Page 

 Pitchftone, ' . . 122 Raphidia, . n. 5 

 « ...with opal, 133 Rattlefnakes, enquiries con- 

 Plants to preferve and tranf- cerning, . 192 

 port, . • 23 Ravens, Indian, 190 

 «... to defcribe and draw, Realgar, . 151 

 xi. xv Religious rites, queries on, 177 

 . „ . . to dry, . . 35 Reptiles to preferve, 21 



. to take impreflions of, 39, Refplendent hornblende 1 15 



Piafter of Paris, 62,106 Rhomboidal nitre, 101 



Paris in water, 62 Rice, kinds of, 196 



..... Hone, . 62 Riute, facred book, 178 



Pktina, . 137 Rochel, . 194 



Plumbago, . 170 Rock oil, . . 165 



........ common, 170 Rofe fpar, . . 127 



Poifons, effeds of, 1 86 Rubellite, . . 120 



Polite arts, queries upon, 177 Ruby, . . fcjjfjj 



Polygamy, how employed, 1 86 Rubyarfenic, . 152 



Polypes, . . 193 Ruddle ftone . . 134. 



Ponderous earth, 103,107 Ruftofiron, . 71 



- clay, 113 



« . fpar, 107, 108 



Porcelain, . 113 Sal ammoniac, . ior 



Potafh, . . 98 . . catharticus, . 4 8 



Potftone, . 109 ..deduobus . . 80 



Porphyry, 133 ..gemmae, . v . 53 



Prafe, . . 121 marinum . 53 



Pterocarpus, . 196 . . martis, . . 73 



Ptinus, . . n. 3 - - mirabile, . . 48 



Pudding ftone . 135 - - polychreftum, 50 



Pulfe, kinds of, . 195 . . poly ch reft of Glafer, 99 



Pumice, . 172 - - vitrioli, . 77 



Purple of the ancients* 193 Salt, common, . 53 



Puzzolana, . 171 petre, 42, 99 



how manufactured 



Quadrupeds to defcribe, xi in India, • . 199 



catch, 182 ofSedlitz, .55 



iVlK . - - - . oeconomy of, 188 - acid and neuter, 45 



Quartz, - 121,132 firaple, . 96 



Quickfilver, 136, 138 in water to detect, 42 



......... analyzed, 139 Salmiac, . . i'oi 



• . ....... cupreous, 139 Sand, . . 171 



......... hepatic ore of, 1 39 Sappare, . . 114 



c . . . . , . . native, 139 Sapphire, . . 117 



