ANNIVERSARY ADDRESS. 21 
June 3—The Tintometer. By W. A. Dixon, F.C.S., F.1.C. 
July 1—Photographs of Stars and of the Moon to illustrate paper 
read by H. C. Russell, B.A., C.M.G., F.R.S. 
Aug. 5—Prof. Anderson Stuart exhibited and described his new 
instrument for use in explaining the nature of such 
waves as those of light. 
—A new ‘ Dick and Swift’s’ Petrological Microscope. By. 
Rev. J. Milne Curran, F.G.s. 
Sept. 2—Rapid filtration without the aid of pumps. By W. M. 
Hamlet, F.C.S., F.1.C. 
Meetings of Sections.—Three Sections were formed last year, 
viz., Medical, Microscopical, and Civil Engineering. 
The Medical Section held four meetings at which the following 
papers were read :— 
-1—A brief account of the histology and development of tubercle. 
Prof. Anderson Stuart, M.D. 
2—Remarks upon the nature and treatment of diphtheria with 
demonstrations. By Dr. W. Camac Wilkinson. 
3—Glimpses of the Past: aseries of sketches with Pen and Pencil 
of the Medical History of Sydney. By Dr. Houison. 
One of the meetings was devoted to a Medical Conversazione, 
and many objects of much interest were exhibited. 
The Microscopical Section held five meetings at which interest- 
ing exhibits were shown and one paper was read, viz., ‘‘ Notes on 
Slicing Rocks for Microscopical Study,” by the Rev. J. Milne 
Curran, F.G.S. 
The Civil Engineering Section held eight meetings at which 
the following papers were read : 
1—Recent researches on the strength, elasticity and endurance of 
materials of construction, with especial reference to Iron 
and Steel. Considerations with reference to the deter- 
mination of the safe working stresses in Structures. By 
Prof. Warren, M. Inst. C.E. 
2—The bridge over Lane Cove River at the head of the naviga- 
tion. By H. H. Dare, B.c.z. 
