B#<] 



THE GARDENERS' CHRONICLE. 



Xing directed upwards, i 



* " *^S»cture of the Elastic 



April 18.— The Vice-President in 

 Pellatt read a paper on the Sup- 

 Oxy<"en on the Colour or Tint of 



S^tfrUtTexperience in the manufacture of 

 Jm in fern mntities, it oeing only under such cir- 

 ^t*nce9thita*ny of the changes there noticed can 



F ""S'*is no 'C^lerfrJtly^Srlei 6 anTl 



■ shade ; the word < 



•tarer it be, which all white transparent glass pos- 

 Mm. With these remarks, the author proceeded to 

 consider the action of oxygen as affecting the co our of 



s of flint glass are silica, 

 nitrate of potash. The 



The protoxide of 'lead, 

 ead, is the state in which 

 tis the ordinary carb. and 

 ;e. These, when mixed 

 ected to a strong heat for 

 glass. The 



mSL bTEally 6 ! 



Ktoce flint glass. The purer the metal 

 M the glass ; but although all the 

 jically pure, a colourless glass is not 

 »e protnet: owing vo some chemical change which 

 takes pUce during the melting, the glass is tiuted with 

 p»a His is generally stated to arise from the pre- 

 jwrf tab of iron, but the author believes that, in 

 awttinsUnces, it is owing to the want of a necessary 



■■■.■.Aj;e:. in >:,... • 

 £«>™»eoUl go far to prove. The tint of green 

 JShr^ ea ? elead in . the 8 lass mixture is 

 £di25? ? e ox yg ena,10D » that is > wh en red- 

 *•■£' *W * * healithar S e is em P lo yed in 

 waJte green F? is deep ' but ma y be entirel y over. 

 V » parpiTnt wl nUrate ° f P ° taSh ' and ? u P erseded 

 fc* 1 * J 6 8gent by ' whicba theUse changea P in S6 the 

 IZ2fS" 8re effected - *«« g'ass maker, in order 

 ■■ass mm tk 8reen J mt r always P resent when oxygen 



f >Kion of ovvJpn ii re8ence or ab8eace of a g iven 



)T?* d ^hdiffZ! t te8Ume a different colour when 

 :* *», dim, . ' r ?. nt proportions of oxvccn. Tf th» 



fc f ^S ffient > *- which the gUTas the 



■■ ■ . 



' ; ; .. ./.'/' - ■■-- ■-•■ ■ • 



J? 1 ■ £ ch ? mNBURGI, r^Hri2. _ The Pre- 



£*«•&?• """/^ TuTn" »"" ''T 



length of the tube. The ti 

 amylaceous matter, which b< 



both substances were exhibi 



and drawings of the structure wt re shown. Dr. Balfour 



line specimen of dry rot ' 

 chrymans) on a plank several feet in length, taken from 



rood Palace. S. Cobbold, I 

 H. Broadbent, E sq , were elected Fello ws. 



Syllabus of a Complete Course of Lectures o 



Mining. By Professor E. Solly. Longmans. 

 pp. 185. 

 The object of this work, as i 



' 



Agriculture. This object has been attained 

 ordinary degree. The Syllabus before us supplies a 

 vant which must have been felt by every student in 







esent work befoi 



tcertain as to what is worth 



onger be obliged to puzzle his 

 to remember everything, that 



tofrealprac-n,- 



what is to be inwardly digested. 



lly adopted. Instead 

 s and then of organic 





i oxygen, hydrogen. 



>, the author plac. 



id carbon, why not dispose 

 ose elements? According 



irdly, organic bodie3 ; i.i the iirst division as foti 

 rbon and nitrogen, but these, to say the least, hav 

 much right to be treated of in the third as in th 

 •st division. Our author's arrangement is, in ou 



\s a 'specimen of the way in which Mr. Solly ha 



Carbon. Symb. C. Eq. 6.— A. Exists native 



tained as charcoal by the ii 

 fromTe'LpS' 



id ; as a cutting and grinding material ; for 

 pivot-rests in delicate machinery ; as plumbago, to 

 diminish friction ; as charcoal, for fuel, as a deoxidising 



Utention, and the study of which is worth 

 ng up in the larger treatises of Graham, Braude, 

 . Da dm, I is furnished 



Bradbury and Evans with their usual excellence and 



mate by a more powerful acid 



produced during its own evaporation. Its acid p< 

 ry feeble ; it scarcely reddens vegetable 

 Combined with bases, it forms carbonates ; 



- ' 

 lost all other acids. At a h 



m posed by several of the m 

 nned. Potassiui 



in town from Lord Torrington, Governor of Ceylon, 

 announcing the sudden death, from apoplexy, of Dr. 

 dent of the Botanic Garden, 

 Peradenia, Kandy, Ceylon. This zealous naturalist was 

 r, when proftssor of botany 

 isity of Glasgow. Soon after leaving 

 w, he undertook the enterprising journey recorded 

 Travelsin the Interior of Brazil" (seeAlhenaum, 

 No. 1012). He penetrated on this occasion as far west 

 tributaries of the Amazon, and from near the 

 to the 23d degree of south latitude. Upon his 



gardeners Dr. Gardner is well known a* ti 



■ eminent of Ceylon as well 



as to science, for at the time of his death he was en- 



: wing an elementary work on Vegetable 



Physiology and Botany, adapted to the wants of the 



Kandian population 1 





ployed in the manufac 

 -Chemxslry of Veget 



e /,j^.— A. The Food of didiositi < 

 , oxide of iron, with 'small ranged b 



Calendar of Operations. 



t by plants, but, by their growth sh.uld be carefully examined, and repdtl 



commencing 



