BY H. C. EUSSELL, F.E.S., C.M.G. 29 



transit instrument from time to time for teaching students in 

 Astronomy. 



If the arrangement assumed in (c) could not be made, there 

 would still be sufficient funds out of the d£3,000 for instrii- 

 ments for the purchase of a transit instrument. (See 

 appendix A.) 



The necessary equipment for an Observatory consists of a 

 transit instrument, an equatorial with attached star camera, 

 a good clock, photographic outfit, furniture, etc. 



If it were proposed to devote the Observatory to th^ 

 making of star catalogues, the greater part of the money 

 would have to be spent upon the transit instrument ; but 

 since this is not proposed, a transit instrument of moderate 

 cost will serve every purpose, and the greater part of the 

 expenditure may properly be made upon a really fine 

 equatorial with star camera attached, — such an instrument, 

 in fact, as is used by all the 15 observatories taking part in the 

 great work of photographing the heavens. This is, in the 

 first place, an equatorial telescope of 10 inches aperture, and 

 mounted on a stand of the most perfect kind that modern 

 instrument makers can make, and so constructed that it 

 carries with the telescope a star camera, with an object glass 

 of 13 inches diameter. Such an instrument would be fit for 

 any extra meridian work in addition to its use with the star 

 camera. In fact, this instrument would be an exact counter- 

 part of the instruments used in Greenwich, Paris, and other 

 first-class Observatories for similar work, and would place 

 the " Leake" Observatory in a position to ^o first class ivorlc, 

 with the advantage of position over all other southern 

 Observatories. 



The only building required would be a round one, 26 feet 

 in diameter, with revolving roof, and having cellar space 

 sufficient for photographic work. 



One first class regulator clock, together with some photo- 

 graphic and electrical apparatus and furniture, would complete 

 the outfit, the cost of which I have estimated in appendix A. 



I have been careful to add to the actual cost of the smaller 

 items from 25 to 40 per cent, in each case, well knowing that 

 contingencies arise which increase the cost. 



The great item, the equatorial, I have set down at the price 

 paid by Greenwich, the Cape, and Melbourne. In providing 

 for the staff of the Observatory, I have ventured to suggest 

 the appointment of a Demonstrator in Physics, in addition to 

 the Lecturer, or rather to help the Lecturer in Mathematics, 

 Physics, and Astronomy, because experience here shows that 

 the professor or teacher in these subjects must have some 

 help of the sort. If the expenditure is deemed too great^ 

 it could be reduced to, say, dSlOO ; for which salary I have no 



