Philosophical Transactions of the Royal Society of London, Volume 129W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1839 |
Altre edizioni - Visualizza tutto
Philosophical Transactions of the Royal Society of London, Volume 125 Royal Society (Great Britain) Visualizzazione completa - 1835 |
Philosophical Transactions of the Royal Society of London, Volume 108 Royal Society (Great Britain) Visualizzazione completa - 1818 |
Philosophical Transactions of the Royal Society of London, Volume 103 Royal Society (Great Britain) Visualizzazione completa - 1813 |
Parole e frasi comuni
acid action alcohol ammonia amnion appears arch attraction axis azimuth bisalt Carbon cell centre charged chlorate chloride chorion clouds and wind Cloudy-light compass contained cubic inches direction disc distance disturbing force effect electricity electrometer embryo equation equivalent experiments FAHR Fallopian tube feet fluid germ germinal spot germinal vesicle Glen Roy globules Graafian vesicles grains gave granules h m h m heat height hydrogen induction JA.M lamina Lochaber Lond magnetic mass MDCCCXXXIX membrane f motion nearly nitrate nitric acid observed obtained ovary Overcast-light ovum oxide oxygen P.M. Fine-light clouds particle pellucid plane Plate VIII platinode portion post coitum potassa precipitate present pressure quantity Rabbit rain resin Royal salt seen shelf shell shelves ship's head side silver Society solution spheroid stage suppose thickness throughout the day tion uterus valley wind throughout yelk zincode zona pellucida
Brani popolari
Pagina 433 - Observations on the Parallel Roads of Glen Roy, and of other parts of Lochaber in Scotland, with an attempt to prove that they are of marine origin.
Pagina 13 - We have the analogy in relation to heat and magnetism. SEEBECK taught us how to commute heat into electricity; and PELTIER has more lately given us the strict converse of this, and shown us how to convert the electricity into heat, including both its relation of hot and cold. OERSTED showed how we were to convert electric into magnetic forces, and I had the delight of adding the other member of the full relation, by reacting back again and converting magnetic into electric forces. So perhaps in these...
Pagina 11 - It is evident from all the experiments, as well as from simple considerations, that all the water and all the conducting matter around the fish through which a discharge circuit can in any way be completed, is filled at the moment with circulating electric power : and this state might be easily represented generally in a diagram by drawing the lines of inductive action (1231.
Pagina 11 - A live fish, about five inches in length, caught not half a minute before, was dropped into the tub. The Gymnotus instantly turned round in such a manner as to form a coil, inclosing the fish, the latter representing a diameter across it ; a shock passed, and there, in an instant, was the fish struck motionless, as if by lightning, in the midst of the waters, its side floating to the light. The Gymnotus made a turn or two to look for its prey, which, having found, he bolted, and then went about searching...
Pagina 435 - By the Rev. James Farquharson, LL.D., FRS The principal object to which the author directed the inquiries of which he here gives an account, is the determination by geometrical measurement of the height of the aurora borealis...
Pagina 12 - ... but a little consideration soon makes one conscious of many points of great beauty, illustrating the wisdom of the whole arrangement. Thus the very conducting power which the water has ; that which it gives to the moistened skin of the fish or animal to be struck ; the extent of surface by which the fish and the water conducting the charge to it are in contact ; all conduce to favour and increase the shock upon the doomed animal...
Pagina 108 - ... electrolysis of an equivalent of simple chloride of lead, cannot at the same time be sufficient to electrolyze an equivalent of chloride of sodium, and an equivalent of water, at the same electrodes. The sum of the forces which held together any number...
Pagina 13 - ... negative results, will regulate further expectation. And with respect to the nature of nervous power, that exertion of it which is conveyed along the nerves to the various organs which they excite into action, is not the direct principle of life ; and therefore I see no natural reason why we should not be allowed in certain cases to determine as well as observe its course. Many philosophers think the power is electricity. Priestley put forth this view in 1774 in a very striking and distinct form,...
Pagina 133 - ... are given representing the salts of lead on this theoretical view. By boiling the resin in contact with ammonia and nitrate of silver, or perhaps with nitrate of ammonia, it is converted into a resin which forms a bisalt with oxide of silver, in which there is also an apparent replacement of hydrogen by silver. The resin next examined is that of dragon's blood : and the conclusions deduced from its analysis are the following. First, that the lump dragon's blood...
Pagina 350 - ... very different from that of the mature ovum ante coitum. Among the changes occurring in the ovum before it leaves the ovary, are the following : viz. the germinal spot, previously on the inner surface, passes to the centre of the germinal vesicle ; the germinal vesicle, previously at the surface, returns to the centre of the yelk ; and the membrane investing the yelk, previously extremely thin, suddenly thickens.