ABSTRACT OF PROCEEDINGS. XXI. 



Haswkll, Prof. W. A., m.a., d.Sc, f.r.s. — I. Caryophyllceopsis 

 an unsegmetited Tape-worm from the intestine of the Port Jackson 

 shark. 2. Stratiodrilus a new primitive worm found among the 

 gills of Tasmanian crayfishes, and regarded as intermediate 

 between the Wheel- Animalcules or Rotifera and the ringed-worms 

 such as Earthworms. 3. Museum microscope, so constructed as 

 to admit of a series of slides being shewn, without microscope 

 being exposed. 



Johnston, S. J., b.a — Microscopical sections of hsematode 

 worms from sheep and birds. 



Liversidge, Prof., m.a., ll.d., f.rs. — 1. Photo-micrometer. 

 2. Tous-les-mois starch. 3. Gold crystals from potassium cyanide 

 solutions. 4. Colour of gold by transmitted light. 5. Spectrum 

 of Didymium glass. 6. Photo-spectrometer. 



Marden, Dr. John, m.a. — Microscope and series of slides shew- 

 ing objects of interest. 



Pollock, Prof., b.e., b.Sc. — 1. Boomerang made by G. T. 

 Walker Esq., m.a., b.Sc, Fellow of Trinity College, Cambridge, 

 author of paper on ' Boomerangs ' in Phil. Trans. Yol. 109a, pp. 

 23-41, 1897. 2. Photograph of a falling drop of water by 

 Lord Rayleigh. 



Portus, A. P., Assoc, m. inst. c.e. — 1. Album of views of Old 

 Sydney. 2. Photograph of first steamer built in Australia 

 "William IV." (Old Billy) [afterwards lengthened]. Built in 

 1831 by Marshall and Lowe, Williams River, employed at coast- 

 ing work for thirty years, then sent to trade at China. 3. Photo- 

 graph of the "Rose" pioneer steamer of the A.S.N. Co., then 

 called Hunter River S. N. Co. Length 150 feet, beam 20 feet, 

 engines 100 H.P., side lever ; pressure 7 lbs. per square inch ; 

 boilers flue type. Speed 11 miles per hour. The "Rose" arrived 

 in Sydney in April 1841, and was the first iron ocean steamer 

 imported. 



Quaife, F. H., m.a., m.d. — 1. ' Electrical Movement in Air and 

 Water with Theoretical Inferences' and supplement, by Lord 

 Armstrong, c.b., f.r.s. 2. Optical experiments. 



