INDEX. 



ture with beansj 38— An excellent 

 fallow for wheat, 39— Method of 

 keeping, 39 — Injurious to horses, 

 though the animal is fond of them, 

 39 — Good for horned .cattle, milch 

 cows, and hogs, but improper food for 

 breeding sows, 40 



Particle, a term used in chemistry. Dis- 

 sertation on its meaning, 81— Ex- 

 plained, 2^9 



Passion Flower, remarks on the expan- 

 sion and closing of, 109— Mode of 

 connection between the anthers and 

 filaments. 111— Impregnation, 112 



Peart, Dr. his objections against the 

 electrical theory of Dr. Franklin, 2 



Petzl, M. on the Bolognian spar, 383 



PhiIochemicu8,answer to his proposition 

 respecting galvanic troughs, and his 

 definition of the word particle^ 239 



Plilogistic hypothesis of Mr. Cavendish, 

 adequate to explain ail chemical phe- 

 nomena, 194, 196 



Phosphorus and sulphur, experimental 

 researches on, 31 



' Preparations of, 381 



Plants, query respecting : Have they 

 Tolition ? 112- Their interior struc- 

 ture, 254 — The line of life essential 

 to the vitality of every part of a plant, 

 256 — Obstructions, 258— Annual for- 

 mation of wood, 262— Formation of 

 the leaf and flower buds, 262— 5e* 

 Flowers and Trees 



Potash, its operation on urine, 130— • 

 Hyperoximuriate of, the production 

 of, 310— Difficulties attending the 

 theory, 311 



Potassium, its action on sulphur, 31 



Potassium and sodium, remarks on, in 

 answer to Mr. Dal ton, with observa- 

 tions on his theory of chemistry, 

 67— Mr. D.'s reply, 157— Farther 

 observations, 219 



Printing from autographs advantageous 

 to men of letters, with the best me- 

 thods of performance, 56 



Proust, M, on the cqiubination of oxi- 



geii with metals, 185— Prire otrtained 

 by him for the extractioh of gr».)* 

 SMgar, 381 



Q. 



Quartz perhaps older than granite, 3lS 



R. 



Razoumouski, Comte Dc, on the lumi- 

 nous spots of the glow worm, 43 



Rcade, Dr. J. Notice of his treatise on 

 the diseases of the eye, 79 



Respiration, mechanlsrn of, 350 



Rockats, milita.-y, claims to the inven- 

 tion of, 63, 161 — Used many year* 

 ago in the' Indian wars, 63— Theory 

 of their motion in nonresisting and 

 resisting mediums, 1G2— Proposition 

 to determine the path of a rocket near 

 the Earth's surface, 162— To find the 

 velocity of a rocket in the curve, 

 164— To find the ho»izontal range of 

 a rocket, 165— To find the height to 

 which a rocket will rise perpendicu- 

 larly, 166— Scholium, 169 



Royal Society at Edinburgh, 238 



S. 



Sand, black, on the banks of the Don, 

 description of, 19— Consists of iron- 

 sand, and iserine, I'O — Description and 

 analysis of the iron-sand, 20— Obser- 

 vations on the contents, 23 — Com- 

 ponent parts, 24— Description and 

 analysis of the iserine, 25— Results, 

 26 — Componeat parts, 27 



Schaeffer's experiments to prove that 

 iron is increased in weight by ex- 

 posure to the air and heat, 188 



Scientific news, 77, 159, 238, 317, 379 



Sea, its luminous appearance, occasion- 

 ed by animalculae, 53 



Shoes fastened with screws, 38i 



Singer, Mr. his electrical le«jtures, 159, 

 319 . ' 



Soda,its effects on the urinary organs,! 29 



Spar, Bolognian, 383 



Sodium, Remarks on tU^ nature of, 68, 

 157, 219 



SoU 



