425 



Frog: on the spawn of the, ii. 49 ; on 

 the changes it3 ovum undergoes 

 during the formation of the tadpole, 

 ii. 227. 



Functions : exponential, ii. 33 ; an 

 essay towards the calculus of, ii. 29, 

 41 ; on the analogy which subsists 

 between the calculus of, and other 

 branches of analysis, ii. 69 ; irra- 

 tional, on the fluents of, ii. 52 ; cir- 

 culating, ii. 89 ; on assigning specific 

 names to all such functions of sim- 

 ple elements as represent physical 

 properties, ii. 299. 



Fungi, which constitute the colouring 

 matter of red snow, on the, ii. 128. 



G. 



Gallois (M. le), remarks on his con- 

 clusion that the action of the heart is 

 dependent on the spinal marrow, ii. 

 8, 10. 



Galls : on the infusions of, i. 115; 

 Chinese, used in dyeing black, ob- 

 servations on, ii. 58. 



Galvanism : galvanic combinations, 

 by single metallic plates and fluids, 

 i. 59; on the effects of galvanism in 

 restoring the due action of the lungs, 

 ii. 55 ; examination of the electric 

 and chemical theories of, ii. 382. 



Garrard ( W.) on a new property of the 

 tangents of the three angles of a 

 plane triangle, i. 293. 



Gas, coal, on the application of to eco- 

 nomical purposes, i. 294 ; experi- 

 ments on, i. 31.0; oil and coal, expe- 

 riments on, ii. 143. 



Gaseous compounds, inflammable, from 

 coal and oil, composition and analy- 

 sis of, ii. 119. 



Gaseous mixtures : on the action of 

 finely divided platinum on, ii. 216 ; 

 on the combustion of, ii. 61. 



Gases: on the quantity of gases absor- 

 bed by water, i. 103; condensation of 

 several into liquids, ii. 192; inflam- 

 mable, apparatus for the analysis of, 

 i. 309. 



Genoa, on the manufacture of sulphate 

 of magnesia at, ii. 48. 



Geometry, ancient, and modern analy- 

 sis, comparison of, i. 70. 



Georgian planet, observations of the 

 satellites of the, ii. '2o. 



Gibson (B.), description of an extraor- 

 dinary human foetus, i. 360. 



Gilbert (D.) on the mathematical the- 

 ory of suspension bridges, ii. 269 ; 

 on assigning specific names to all 

 such functions of simple elements as 

 represent physical properties, and 

 suggestion of a new term in' mecha- 

 nics, ii. 299 ; on the progressive im- 

 provements in the efficiency of steam 

 engines in Cornwall ; with investi- 

 gations of the methods best adapted 

 for imparting angular velocities, ii. 

 393. 



Giles (D.) on a singular fact in natural 

 history, ii. 137. 



Gilpin (G.) on the variation and the 

 dip of the magnetic needle, made at 

 the Royal Society between the years 

 1786 and 1805, i. 244. 



Gizzards of grazing birds, on the, i.370. 



Glaciers of Chamouny, curious pheno- 

 mena observed on the, i. 133. 



Glands : black bronchial, on the co- 

 louring matter of the, i. 464; gastric, 

 coagulating power of the secretion 

 of, i. 452 ; of the Java swallow, on 

 the, ii. 77; of the human stomach, 

 observations on, ii. 79 : prostate, ac- 

 count of a small lobe of, i. 224 ; sol- 

 vent, different structures and situa- 

 tions of in birds, i. 439; submax- 

 illary odoriferous, on the structure 

 and use of in the genus Crocodilus, 

 ii. 309. 



Glass : heated, and glass drops, opti- 

 cal properties of, i. 506 ; ii. 1, 33; 

 on new properties of heat, as exhi- 

 bited in its propagation along plates 

 of glass, ii. 33 ; on some phenomena 

 of colours exhibited by thin plates, 

 ii. 15 ; on the communication of the 

 structure of doubly-refracting cry- 

 stals to, ii. 39 ; on the manufacture 

 of for optical purposes, ii. 383; on the 

 elasticity of threads of, with some of 

 the most useful applications of this 

 property to torsion balances, ii. 402. 



Glossopora, the genus, ii. 78. 



Gold, on the various alloys, the specific 

 gravity, and the wear of, i. 105. 



Goldingham (J.) on the eclipses of the 

 satellites of Jupiter, i. 312; obser- 

 vations for ascertaining the length of 

 the pendulum at Madras, ii. 165 ; 

 the geographical situation of Cal- 



