320 On the Corpuscles of the Blood. 



dimf'' and this view seems to hold good with regard to the whole 

 of the pass of the Grimsel. Near the wooden bridge which, above 

 Handeck, leads from the left to the right bank of the Aar, we 

 see quite at hand smooth strata which become concealed under 

 those that are superimposed, and which run under the latter 

 with the same smooth surfaces. Beautiful convex masses, 

 forming layers the one above the other, again appear on the 

 Sidelhorn acclivity of the valley of the Grimsel, and on the 

 pass itself. Saussure would scarcely have recognised a polish 

 produced by glaciers in the ^^ Bochers moutonnes^'' which are 

 formed by these layers ; in fact, the appearance seems to indi- 

 cate and to prove a much more comprehensive and more widely 

 extending cause than the action of glaciers could have been."*] 



The Cells in the Ovum compared with Corpuscles of the Blood. — 

 On the difference in Size of the Blood- corpuscles in dif- 

 ferent Animals. By Martin Barry, M.D., FB.S.S.L. 

 and E'i 



1. In several comm.unications presented to the Royal So- 

 ciety, and printed in the Philosophical Transactions, it has been 

 my endeavour to shew that the remarkable process effecting 

 the division and subdivision of what is usually termed the 

 ** yelk'* in the mammiferous ovum, is to be recognised in other 

 cells ; and nowhere more distinctly than in certain states of 

 the corpuscles of the blood. In proof of this, I gave the de- 

 lineations, figs. 1 to 5, along with many others. Figs. 1, 2, 3, 

 represent blood- corpuscles (cells) of 

 the Sparrow. 1. The nucleus single : 



2. The nucleus dividing into twoparts : 



3. This division is complete. Figs. 4, 

 5, are blood-corpuscles (cells) of the 

 foetal Ox, three-quarters of an inch in 

 length : 4. The nucleus consists of two 

 discs : 5. The discs have separated 

 and much increased in size, and they 

 are passing into the state of cells. 



* Monthly Reports of the Academy of Sciences of Berlin, and Poggendorflf 's 

 Annalen, 1843, No. 2, p. 289. 

 t London, Edinburgh, and Dublin Phil, Mag. 1st June 1843. 



