The Monthly Microscopical Journal: Transactions of the Royal Microscopical Society, and Record of Histological Research at Home and Abroad, Том 4Robert Hardwicke, 1870 |
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Стр. 20
... objective for the microscope . IV . - On the Optical Advantages of Immersion Lenses and the Use of Deviation Tables for Optical Research . By ROYSTON- PIGOTT , M.A. , M.D. , M.R.C.P. , F.C.P.S. , F.R.A.S. , late Fellow of St. Peter's ...
... objective for the microscope . IV . - On the Optical Advantages of Immersion Lenses and the Use of Deviation Tables for Optical Research . By ROYSTON- PIGOTT , M.A. , M.D. , M.R.C.P. , F.C.P.S. , F.R.A.S. , late Fellow of St. Peter's ...
Стр. 21
... objective and the cover- ing glass , though the thickness of this delicate plate may not exceed half a hundredth of an inch . Thus it will be found that calling the quantity of light gained by a given dry or pneumo - objective unity ...
... objective and the cover- ing glass , though the thickness of this delicate plate may not exceed half a hundredth of an inch . Thus it will be found that calling the quantity of light gained by a given dry or pneumo - objective unity ...
Стр. 22
... then one of glass ( the front lens of the objective ) , are there any optical advantages gained The by the use of this immersion lens ? Mr. 22 Monthly Microscopical Journal , July 1 , 1870 . On the Optical Advantages [
... then one of glass ( the front lens of the objective ) , are there any optical advantages gained The by the use of this immersion lens ? Mr. 22 Monthly Microscopical Journal , July 1 , 1870 . On the Optical Advantages [
Стр. 23
... objective via water , whilst only those less oblique than an angle of 41 ° 48 ′ can possibly reach the objective via air . One advantage , then , of water versus air is that it enables the objective to gather oblique rays , striking it ...
... objective via water , whilst only those less oblique than an angle of 41 ° 48 ′ can possibly reach the objective via air . One advantage , then , of water versus air is that it enables the objective to gather oblique rays , striking it ...
Стр. 24
... Objective . REFRACTIONS FOR IMMERSION . ( Water . ) φ ' Deviation . φ ' O O O 0 40 0 20 1 20 0 40 2 00 1 00 2 43 1 ... objectives now in use , the writer will be amply rewarded for his pains . Apparently deviations for every degree up to ...
... Objective . REFRACTIONS FOR IMMERSION . ( Water . ) φ ' Deviation . φ ' O O O 0 40 0 20 1 20 0 40 2 00 1 00 2 43 1 ... objectives now in use , the writer will be amply rewarded for his pains . Apparently deviations for every degree up to ...
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aberration acid albumen alcohol angle animal aperture aplanatic appear Bastian beads biliary tubules bioplasm blood blood-vessels Canada balsam capillaries capsule cells cent ciliary ciliary muscle colour containing crystals described diameter diatoms Entomostraca epithelium examination exhibited experiments eye-piece fact fermentation fibres filaments fluid focal length frustules genus germs glass globule Hagen hepatic artery hepatic duct hepatic veins hexradiate illumination immersion inch Infusoria injected Journal lens lenses light linear liver lymphatics Magnified matter membrane micro MICROSCOPICAL SOCIETY microscopists minute muscle muscular nerve object-glass objective oblique observed obtained optical organisms paper parenchyma particles pencil Pigott placed plate plexus Podura portal vein portion present produced Professor rays refraction remarks ROYAL MICROSCOPICAL SOCIETY sarcode scale sections seen Silurian slide solution species specimens spherical spherical aberration spicula spiculum sponge spores stomata structure surface tion tissue Tolles tube valve vessels Wonfor
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Стр. 232 - But if, in the present state of science, the alternative is offered us, either germs can stand a greater heat than has been supposed, or the molecules of dead matter, for no valid or intelligible reason that is assigned, are able to rearrange themselves into living bodies, exactly such as can be demonstrated to be frequently produced in another way, I cannot understand how choice can be, even for a moment, doubtful.
Стр. 151 - ... foci coincide, the ratio of the size of the object to the size of the image formed by the combined systems is equal to the ratio of the principal foci of the two optical systems adjacent respectively to object and image. The two optical systems in this case are...
Стр. 163 - They were found buried in the sand. The peduncle, which was about six times the length of the shell, being encased in a sand tube differing in no respect from the sand tubes of neighboring annelids. In many instances the peduncle was broken in sifting them from the sand, yet the wound was quickly healed and a new sand-tube promptly formed. When placed on the surface of the sand they were noticed to move quite freely, by the sliding motion, in all directions, of the dorsal and ventral plates, aided...
Стр. 164 - Experiments on itacolumite (articulite), with the explanation of its flexibility and its relation to the formation of the diamond.
Стр. 147 - The actual direction in the plant is from the apex of the leaf in sunlight and toward it in the shade. This change in direction is so rapid when produced by the shadow of fast flitting clouds across the sun's disc that it would seem that the change of temperature could hardly be felt by the plant, it certainly could not be by an ordinary thermometer ; but a heated body properly placed will quicken the circulation, as will cold retard it.
Стр. 201 - I think they consist of a peculiar kind of living matter, the smallest particle of which, when supplied with its proper pabulum, will grow and multiply, giving rise to millions of little particles like itself, each having similar properties and powers.
Стр. 336 - Ueber die wachsende Kenntniss des unsichtbaren Lebens als felsbildende Bacillarien in Californien. Mit 3 Taf. Abbild. 1870. gr. 4°.
Стр. 163 - It was distinctly and regularly ringed, and presented a remarkably worm-like appearance. It had layers of circular and longitudinal muscular fibre, and coiled itself in numerous folds or unwound at full length. It was contractile, also, and quickly jerked the body beneath the sand when alarmed.
Стр. 326 - But expectation is permissible where belief is not; and if it were given me to look beyond the abyss of geologically recorded time to the still more remote period when the earth was passing through physical and chemical conditions...
Стр. 163 - Lingula had the power of moving over the sand by the sliding motion of the two valves, using at the same time the fringes of seta) which swung promptly back and forth like a galley of oars, leaving a peculiar track in the sand.