564 



Forestry Diploma at Cambridge. [dec, 



excelsa (just as the larch aphis is an emigrant generation from 

 the large cone-like galls on the spruce). In view of this, 

 attention should be given to the spruce, and any young galls 

 should, where possible, be removed and burned. It is not an 

 uncommon sight to see spruces laden with such galls, each of 

 which is a centre of infestation for larch, pine, and firs. About 

 October, when the return of the Chermes to the spruce may 

 be expected for egg-laying, from which will come the gall- 

 making generation, the trees should be sprayed with paraffin 

 emulsion. As the trees are at that time passing into the 

 winter-resting condition they would not be likely to be much 

 harmed, and there would be the great advantage of killing the 

 egg-laying females — the starting-points of the new cycle. If it 

 is thought that the trees will bear it (which is doubtful in bad 

 cases), the winter wash recommended for fruit trees in Leaflet 

 No. 70 may be tried.* Whatever be used it is certain that 

 the eggs will not be affected, and, therefore, in early spring 

 recourse should again be had to the paraffin emulsion, which is 

 prepared as follows : — 



Add 3 lb. of soft soap to 1 gallon of boiling water. Boil these, 

 and while still boiling hot pour into 2 gallons of paraffin. 

 Churn thoroughly (this is very important) until a butter-like mass 

 results. For use dilute with ten times the quantity of water. 



If well made, and given an occasional stir, the ' ( stock " will 

 keep for a very long time. 



The Syndicate appointed by the Senate of Cambridge 

 University to consider the desirability of establishing in the 

 University a diploma in forestry have re- 



F °at S Cambpd l0 e ma commended that such a di P loma should be 

 established, and that it should be granted 



to candidates who have (a) been admitted to a degree in the 



University ; (b) passed an approved preliminary examination 



* This winter wash is prepared_by first]! dissolving I lb, of commercial caustic 

 soda in water, then I lb. of crude potash^in water. When both have been dis- 

 solved mix the two well together, ' then add f lb. of soft soap or agricultural 

 treacle, stir well, and add sufficient i water to make up to 10 gallons. 



f For previous notes as to Forestry Education, see /ourna! ) April, 1904, p. 1, and 

 March, 1905, p. 751. 



