BOTANICAL TOUR IN THE HIGHLANDS OF PERTHSHIRE. 475 
known. The Scurvy-grasses, Cochlearias, have the reputation of 
preventing or curing the terrible malady from which they have 
got their name. We should be obliged to our correspondents for 
information about the cultivation of this famous antiscorbutic 
plant. We believe that all the species are more or less pos- 
sessed of such properties. They grow best in a nitrogenized soil, 
and to this character is probably owing their partiality to the vi- 
cinity of dwellings. When rapidly grown, their acridity is dis- 
persed in the mucilage with which they abound, and they are 
then both succulent and agreeable esculents. We have seen fields 
near London dug up for the growth of Cabbages or Cauliflowers 
so full of half-decayed cow and horsedung that the odour of the 
soil was exceedingly offensive. (Qy. Are vegetables grown in such 
a compost healthy articles of food?) We know Cucumbers and 
Melons are grown on undecayed manure, but we have heard that 
they are not universally deemed salubrious. These questions are 
not without interest, especially in sanitary respects, and are de- 
serving of more attention than they have hitherto obtained. I re- 
member, when a youngster, that Turnips grown on undecomposed 
manure were considered rank, and not so palatable as those that 
grew on a more natural soil. We shall be obliged to our kind 
correspondents for their remarks, and the results of their obser- 
vations, on these matters. 
Botanical Tour in the Highlands of Perthshire ; from Callander 
to Killin, by the Pass of Leny, Strathire, Balquhidder, Loch- 
earn Head, Glen Ogle, and Glen Dochart. 
(Continued from page 458.) 
On the 10th of July,—a beautiful morning, but rather chilly, 
for there had been a sharp frost, not an unusual occurrence m 
these mountainous localities,—we started at four o’clock. The 
sun was already up, and shining on the head and shoulders of 
Ben Ledi, “that raised its ridge in air;” but the genial effects 
of solar heat were unfelt in the valley where we were, and the 
benumbing effects of the chilling, damp, frosty atmosphere were 
felt at our finger-ends. The great length of daylight, even at 
Edinburgh, was one of the phenomena not unobserved. In the 
beginning of July the light at nearly eleven o’clock in the evening 
was quite equal or greater than the light at nine p.w.in London. 
