26 THE ACCLIMATISATION 



this point his attention was particularly- 

 directed. In January, 1864, just at the 

 most suitable time, Messrs. Money Wigram 

 and Sons offered a space of fifty tons by 

 measurement in their fine ship the Norfolk^ 

 declining the hundred guineas which Mr. 

 Youl had offered them on his own account 

 in discharge of the freight, and wishing this, 

 to be their contribution to an undertaking- 

 of so much scientific interest and commercial 

 value. The ice-house was built upon much 

 the same plan as in former shipments, but 

 the swing trays and supply pipes were 

 abolished. The ova were to receive nO' 

 other supply but that from the melting ice, 

 and pro-vision was made for thoro.ugh drain- 

 age. It was not to be opened until their 

 arrival, and they were enclosed and sealed 

 up in it, so that whatever the fate of the- 

 plan of non-intervention might be, it would 

 be rigidly carried out. External air of a high 

 temperature would be excluded, and some 

 parts, at least, of this twenty-five tons of 

 Wenham Lake ice might arrive unmelted. 

 The packing of the ova was done in 



