3S2 



INDEX. 



Nenvton (Sir !.)• On the aether 

 of, 1 55 ; certain doctrines of, 



222 



€'Brien the giant, _ 35> 



Oil of laurel cherry. Experiments 

 on, 153 



0//>' mailers. Spontaneous com- 

 bustion of, 35 1 



Others^ star. Observations on, 

 217; orbit of, 3:^5 



Opii-s long known, 245 



Orchis root. Preparation, culture, 

 and use of, 158 



Cxygen, its effects on the blood 

 known in 1 734, 222 ; experi- 

 ments on animals in, 257 



Qxyn.uriatic acid a cure for scar- 

 let fever, 127; for infected 

 cattle, 374 



Pamte'*s Guide. Tingry's, 280 

 Palhs. Orbit of, 32$ 



Fapti'cn'i process for dyeing 



Turkey red, 43 



Percivd on orchis root, 158 

 Periscopic spectacles. Jones on, 



65,273; WoUaston on, 165 

 Petrifactions. Singular, 93, 187, 



375 

 Pezroni's medical expedition, 



287 

 Piazzi's catalogue of stars, 209 ; 



obliquity of ecliptic, 21 1 



Piazzi^s planet. Orbit of, 325 

 Pterrepent on use of potatoes for 



cattle, 298 



P/!)Oj/)''-'orw^ In charcoal, 35 J 



Phosphurel of lime. Production 



of, . 354 



Plains. Height of, above the 



eea, 28 ; great extent of some, 



^9 



Tlanche on succinic acid and on 

 amber varnish, 278 



Pntuniatic mediC'ne, 7 t 



Poisoning of arrows, 163 



Polypterdy a new genus of fish, 

 36 

 Potatoes. On steaniing, for cat- 

 tle, 116, 298 



PoivdiT milh. Cause' of cxpIo» 



sions in, 354 



Poivnall on Sir Isaac Newton's 



aether, and on Galvanism, 

 I5f 

 Printing in Turkey, 367 



Proclus's burning mirror, 54 

 Prussian blue. Experiments on, 

 1.51 

 Prussiiite of potash. To obtain, 



free from iron, 151 



Prussia acid. Experiments on, 



151 ; singular production of, 



»54 



Publications. (New), 85, 280, 



375; astronomical, 218 



Puirid fever cured by oxygen 



gas, 7 1 



Putrid substances absorb oxygen,. 



257 



Pyrophorus from prussiate of 



iron, 151; production of, 



353 



^adrant. When first used, 89 



Recorders knowledge in optics, 



254 

 Rect'iflcation of spirits, 3 2 1 



Rid hcrrjrgs, .19 



Red, Ttirhy. To dye, 43 



Refraction, dou'^k, applied to 

 improve astronomical instru- 

 ments, 213 

 Respiration. Spallanzani on, 



256 

 Rheumatism. A cure for, 3 1 7 

 Rice inferior in nutriment to 

 salep, 160 



Robinson (Dr. Bryan), curious 

 extract from his works, 22S 

 Roloff on oil of laurel cherry- 

 leaves, 153 

 Rossi's Galvanic experiments. 



Royal Society of Gottingen, 35 8 

 Royal Jcademy, 364 



Russel's improved well-bucket, 



271 

 Russia. On the trade of, 285 



Rye 



