114 
Dr Yule on a Collection of Plants 
the natives, at any of those places, have attempted to prevent 
his return : for which purpose, each boat would have been 
mounted with 6 small swivel guns, a couple of which from each 
boat might have been mounted on spare stocks driven into the 
ground, on some commanding situation at the carrying place, to 
protect the party during that operation ; and by having all the 
gang-casks, chests and packages, made to stow to the best ad- 
vantage, and marked and numbered for each boat, would have 
prevented any delay or confusion at the cataracts. With this 
scheme in view, he would have laid his account to be in the 
Congo by the end of May, to ascend the river while the sea 
breezes were strong, and reached far inland, and while the cur- 
rent was only at 5 miles per hour ; because during the rainy 
months there is much of calm weather, and the stream running 
6 and 7 miles per hour, which would render the navigation ver y 
tedious. 
( To he continued.) 
Art. XX. — Notice of a Collection of Rare Plants from India., 
presented to the Botanic Garden of ‘ Edinburgh, by Dr WalUch 
of Calcutta and Lieutenant-Colonel Udney Yule, C. B. leith re- 
marks on the best method of introducing Tropical Species into 
Europe. By John Yule, M.l). F.ll.S.Ed. and M. W. S. 
HE most remarkable circumstance observable on the arrival 
of these plants at Edinburgh, was their general healthy state, 
and the great proportion of them alive, after a voyage generally 
so inimical to plants accustomed to a tropical climate. Colonel 
Yule, who brought them home, attributes thjs chiefly to the 
liberal attention and care of Captain Havard of the Honour- 
able Company’s naval service, who directed the most careful 
treatment of them by judicious watering, and covering the case 
with an awning,, to protect the plants from the scorching sun, 
and equally destructive rains, during the passage. This collec- 
tion originally consisted of about fifty species, and although 
several of them belonged to tribes but little capable of endu- 
ring extremes, either of temperature or dryness, yet nearly one 
half of them, including some whose seeds had germinated to- 
