PRESIDENTIAL ADDRESS. 21 
2. Mode of Occurrence of Gold in Quartz.—A large 
amount of work has been carried out, and the results are 
published in Bulletin No. 4. Provisional results of con- 
siderable value to the mining industry have been obtained. 
3. Alunite.—Methods of treatment of each of the alunite 
deposits of Australia have been worked out. The results 
are published in Bulletin No. 3, and large-scale experi-. 
ments are in progress by the owners of certain of the de- 
posits with a view to the establishment of the potash in- 
dustry. 
4. Yeasts and Breadmaking.—Results which may be of 
considerable importance with respect to the solution of 
the day-baking trouble, and which are of considerable 
scientific value, have been obtained. 
5. Damage by Insects to Grain in Store.—A preliminary 
report has been made by the Committee, and published in 
Bulletin No. 5. Recommendations for systematic investi- 
gations have been made, but the question is still under 
consideration. 
6. Purification of Damaged Wheat by Lime.—The re- 
sults of these investigations were reported in Bulletin No. 
aE 
7. Electrical Sterilisation of Milk.—These investigations 
are still in progress. 
8. Tanning Methods in N.S.W.—Investigations in pro- 
2Tess. 
9. Utilisation of Mangrove Bark for Tanning (Queens- 
land).—The investigations are not completed. Valuable 
results regarding decolourisation have been obtained. 
10. Utilisation of Red Gum for Tanning (W.A.).—In- 
vestigations are in progress. Work has been delayed owing 
to difficulty in obtaining a properly trained leather chemist. 
11. Means of Transmission of the Worm Nodule Para- 
site.—Investigations are in progress. 
