Revieivs and Notices of Boohs. 



293 



Newe. frost may be regarded as of certain occurrence every week 

 up to the end of the first week of May ; in the west and islands to 

 the end of March ; and elsewhere to the middle of April. 



" %th, That at Glasgow and Baillieston, frost may not be ex- 

 pected to occur after the first week of May, being a fortnight 

 earlier than the other inland stations. Query — Is this due to 

 the proximity of the Atlantic ? and is the eff'ect of that ocean with 

 respect to frosts really felt in so marked a manner in localities 

 at so great distances from the west coast 1 



These conclusions will be at once recognised to be of the 

 utmost value in their bearings on the character of the climate of 

 the different parts of the country, and in determining how far each 

 locality may be suitable in the treatment of different classes of 

 diseases, and in supplying valuable information in deciding 

 whether particular crops may be cultivated with a fair prospect of 

 success. To farmers and gardeners they are invaluable, as indi- 

 cating the proper and safe time for planting the potato and other 

 tender exotics grown in the open air, inasmuch as the time when 

 frosts most commonly cease to occur is tliereby made known." 



If the temperature during the day repeatedly rise to 65°'0, the 

 heat thus received by the crops is sufficient for the growth and 

 ripening of oats and the coarser sorts of grain ; it is also sufficient 

 for the growth of wheat and the finer cereals up to the period of 

 flowering. The observations made respecting the occurrence of 

 this important degree of temperature over the country are thus 

 summarised : — 



" \st^ That as regards- tlie months, in the central and eastern 

 districts, a temperature of 65°-0 will occur some time in May and 

 June ; in April the chances of its occurring or not occurring are 

 about equal ; and in March it is not likely to occur at all ; — in 

 the western districts these occur nearly a month later ; and in 

 islands nearly two months later. 



" 2d, That as regards the weeks, 65°-0 occurs so seldom, that it 

 need not be expected on the mainland till the end of April, and 

 in a few places there not till a week or a fortnight later ; and in 

 the islands till the second week of June. 



" 3(i, That in these different localities, for four weeks after the 

 above times, it occurs just so often as to make it a matter of 

 equal probability, whether in any of these weeks it happen or 

 not. 



" 4i/i, That, from and after the last week of May in the central 

 and eastern districts, from the first week of June in the western 

 districts, it will probably occur every week ; and in the islands 

 during the whole of June, the chance of its not occurring is the 

 greater. 



'* bill, That the districts where 65°-0 is of most frequent occur- 



NEW SERIES. VOL. XIX. NO. II. APRIL 1864. 2 P 



