SILKWORM-OAKS OF NOllTllEKN CHINA. 



491 



4 



should certainly in Central Europe need no protection*. The 

 introduction of so highly important a brancli of industry, promis- 



De CandoUe reduces it to Q, rohitr. On the other hand, Miqucl declares 

 (Ann. Mus. Lugd.-Bat. i. 104) that Q. castan€<Bfolia is not distinct from the 

 Japanese and Manchurian Q. serrata^ Thgb., with the Indian form of \vhich 

 C. Koch unites Q. Libani; and specimens which were bj many botanists 

 taken for the Circassian species (though considered probably ditferont by 

 Alph. De CandoUe) were gathered in Northern China by M. Debcaux. AVliilbt 

 *' tantcD doctorum disscnsiones" prove the intricate relationship of the species 

 of this group, as I have above asserted, it is no wonder that they and other 

 similar instances have largely tended to foster the heresies on t lie subject of 

 species which have sprimg up of late years. 



* The following remarks on the climate are from Mr., Meadows's Keport : — 

 ** The result of our live years' experience of the climate may be given here, 

 **The following is a Table of the extreme temperatures obsen^ed. It gives 

 information much more required by the proposing resident or traveller in new 

 countries than mean temperatures. It shows him what extremes of heat and 

 cold he w^ill have to encounter at times, and for which he must be prepared or 

 suffer severely in consequence. For mean temperatures people are rarely insuffi- 

 ciently prepared. The chief practical defect of the Table is, accordingly, the 

 absence of a column showing the heat in tlie sunshine in summer. The obser- 

 vations from which It is made were all taken from Fahrenheit's tliCrmometers 



w 



suspended on the northern faces of house-walls, on wliich the sun never shines 

 therefore in the coldest and coolest places : 



Month. 



Coldest. 



War 



J 



mest. 



Morning at 

 Daybreak. 



Afternoon at 

 2 to 4 P.M. 1 



1 



Morning at 

 Daybreak. 



Afternoon at 

 2 to 4 P.M. 



January 



0° 

 27 

 41 



57 

 G2 

 63 

 41 



28 



7 



-6 



3° 



7 



14 

 41 

 52 

 70 

 74 

 73 

 52 

 42 



17 



2 



39° 



35 



43 



53 

 65 

 76 

 79 



77 

 73 

 66 



52 

 37 



44° 



50 



60 



68 



74 



85 



80 



71 

 61 



44 



February 



Mai'ch ! 



April 



May 



June 



July 



Aujrust 



September 



October 



November 



December 



» 



1 

 1 



" The coolest months are December, January, and February'. The gi'catest 

 cold of a winter may occur in any of these months, but is most likely to occur 

 iu January and first half of February. 



warmest 



The greatest 



summer may occur in any of these montlis, but is most likely to occur iu July 



and first half of August. 



"The number of days in any one winter on which the thermometer btands 



