244 NEW PUBLICATIONS. 
3. That Mr. M‘Ivor’s SAR of mossing is an important discovery i in the di- 
rection of intelligent cul 
4. That the renewal ip oe bark from the cambium leads to different conclu- 
5. That no part of the tree—root, stem, or leaves—visited by the ascending 
sap, seems to be the place of deposit of the alkaloids. 
hat these are formed in the cellular tissue of the bark, beginning from 
the cambium outwards. 
ue, sources whence the materials are drawn for this ene are 
at once the nourishing sap descending in its usual course, and a lateral convey- 
ance, through the prd rays, of part of the deposit of the ATARA 
in the woo 
8. That — as this mother-substance is Hume of the Cinchone, 
and is the source of the Cinchona-red, it may also mainly conduce to the for- 
mation of the ae T it is probable that the characteristic principle of 
each plant is originally 
9. That the above isset deduced by M. Decaisne from his researches on 
eae is equally true as to Red bark. 
0. That no explanation is at present panier of the tendency of the cells in 
he e of the Madder to secrete the peculiar colouring-matter, nor in the 
bark of the Cinchons to produce alkaloid. 
t the electro-chemical properties of the cells are nevertheless iiia 
infused w the respiration, and that z ne the character of this re; 
ration we may artificially control thei ir acti 
12. That the dia not favour, but that the general 
respiration does favour the iem of alkaloids 
13. That the presence or absence à inem has a great influence (through the 
oe ero on all the above phenom 
4. That the laticiferous ducts dwindle and disappear coincidently with the 
"oien of the alkaloids. 
15. That the liber fibres are not the place of deposit of the alkaloids. 
Mr. Howard remarks that the re-establishment of the bark under 
this treatment of mossing is perfect. “I compared this at first " (he 
says)—as indeed the first specimens sent seemed to justify—**to the 
granulation of flesh over the surface of wounds; but the accompanying 
drawings, under the microscope, show the bark in the third time of 
renewal to be perfectly renewed, as is the case in the parts replaced 
by animals of low organization, as the claw, for instance, is formed 
again after being lost by the lobster.” 
