181 6.] Revinv of New Musical Publications. 245 



^structure, wliicb, in a growing Ijone, are stiince made around the external opcu- 



conlinually taking plate, appears to be ings of tiic smaller series of tubes, and 



simply the meclianital pressure exerted upon these only. This opinion derives 



liy the fluid secretions within tlie niedul- support from the recent appearances of 



lary cavities of bone, this power oi)e- the bones of (juadrnpeds, but is most 



rating successively iu diilerent direc- 

 tions, according to the particular <letcr- 

 inination given by the circulation. 



7. That the mode of oircuiation most 

 favourable for ossilic action, is a very 

 slow and uniform motion of the blood 

 through the capillary system ; and that 

 the numerous inflexions of the minute 

 arteries in the pericranium, and the 



clearly established by the characteni 

 found upon the ossilic surface in the 

 bones of birds, where the gradations of 

 progressive evolution are more readily 

 traced. 



11. Tlsat in the flat bones of the skull, 

 the circumstances imder which ossitica- 

 lion takes place, dill'er materially from 

 those above described. In these the 



great weakness and rectangular mode phosphate of lime, in combination with 



of giving off the smaller arteries upon the animal mucilage, is occasionally dc- 



the dura mater, as well as the extremely i)osited in small detached unequal 



curious appearance of the blood and in- masses, without regularity, as if merely 



jected matter, upon the tine menilira- laid in the way, preparatory to their 



iious liniiigs of tiie canals iu cartilage, subsequent application; that these soou 



indicating, as I believe, something be- become connected with the more central 



yond a mere capillary ciiculation, arc parts of the bone, and are found to de- 



to be considered as so many evident crease in thickness as tliey increase la 



provisions for securing this condition. bread'di, imtil they are finally consoli- 



8. That in the formation of the cyliu- dated with the original j)!ate of bone, 

 drieal bones, tiie ossific surface is ar- 12. That the particular simplicity ob- 



ranged into tubular plates of two dide- servabfe in the mode of production of the 



rent sizes, constituting a larger and a bones of the skull, affords a strong argu- 



smaller series; an arrangement by no ment in favour of tiie opinion, that pres- 



nieans essential to the increase of a sure, variously modified, constitutes one 



Lone, because in many of the early of the most eflicient instruments iu the 



stages of ossification, and also where the hand of nature; for, in tiiis instance, the 



frrowth is very slow, the larger series is uniform, though gentle, pressure tioin 



found to be entirely wanting. the inqmlsc of the circulation, and the 



0. That the only apparent use of the constantly increasing volume of con- 

 larger scries of tubes, is that of aug- tents in the head, must be admitted to 

 menting the quantity of blood circulated be the sole agents in comjileting that 

 through the ossifying structure, so as to process, which, in its comuicncemcnt, 

 increase the rapidity of growth, for they had the ajipcaraiice of being conducted 

 are abundant iu animals of quick in a comparatively imperfect manner, 

 growth, less numerous in those that 13. That the ultimate texture of bona 

 reach maturity slowly, and in the same is not laminated, but reticulated, the 

 animal I have observed they arc em- i)hosphate of lime being dtjiositcd As an 

 ployed by nature, or laid aside, in con- interstitial substance; for, although, from 

 fbrmity with the quick or slow dcvelope- the greater compactness necessary to 

 ment of structin-e, which we know aetu- the bones of quadrupeds, tlie ultimate 

 ally takes place at the particular period structure is not inti.em so readily traced, 

 when the examination is made. yet in the more delicately constructed 



10. 'J'hat in the growth of (he cylin- bones of birds this mode of arrangement 



drieal bones, and of those flat bones that is sufficiently obvious, and may at auj 



arc formed upon cartilage, the deposit time be rejulily ascertained, 

 of the ossilic secretion is in the first in- 



REVIEVV OF NEW MUSICAL PUBLICATIONS, 



J seventh Cimcato for the Piiino-fniie, ivith 

 an accompwiiinent for a fall Orchistm; 

 composed, awl dedicated to Misn Emily 

 Ongg, by J. li. Cramer. lU*, 6d. 



THIS is a conspicuous and brilliant 

 production. Teeling animates, 

 geuiU.s brighttns; and variety graces lU« 



series of its passages, while science au- 

 thorizes and tasle conunends the har- 

 monic transitions and cxtianeons inter- 

 vals. 'J'he piece is comjirized in three 

 movements. Tiie first is bold, thougli 

 elaborate, and florid without extrava- 

 gance ; (he second is gentle and re|»o- 

 sii'S; ckyont, sciitimcutal, and intro- 

 ductory 



