94 lit. -Col. Waterfiouse exhibited photographs, [MAltCff, 



Physical Science Committee. 



H. F. Blanford, Esq. H. B. Medlicott, Esq. 



Babu Pramatha Nath Bose, C. S. Middlemiss, Esq. 



J. Eliot, Esq. Fritz rToetling, Esq. 



S. R. Elson, Esq. R. D. Oldham, Esq. 



Dr. G. M. Giles. A. Pedler, Esq. 



C. L. Griesbach, Esq, Dr. Mahendralal Sarkarv 



S. H. Hill, Esq. Dr. W. J. Simpson. 



E. J. Jones, Esq. Dr, L. A. Waddell. 



Dr. William King, D. Waldie, Esq. 



Rev. Father Lafont. Lt.-Col. J. Waterhouse., 



J. J. D. La Tonche, Esq. 



Coins Committee. 



A. Hogg-, Esq. C. H. Rivett-Carnac, Esq, 



Dr. Rajendralala Mitra. C. J. Rodgers, Esq. 



Lt.-Col. W. F. Prideauz. V. A. Smith, Esq. 



History and Archaeological Committee, 



Amir Ali, Esq. F. S. Growse, Esq. 



R. R, Bayne, Esq. Dr. Rajendralala Mitra, 



J. Beames, Esq. J. H. Rivett-Carnac, Esq, 



H. Beveridge, Esq. Pandit Prannath Saras vatf. 



Dr. A. Fiihrer. Kaviraj Shyamaldas. 



Babu Pratapa Chandra Ghosha. Captain R. C. Temple. 



Lieut.-Colonel Waterhouse exhibited some photographs taken on 

 the occasion of the Jubilee Fireworks and Illuminatioiis and made the 

 following remarks ; 



These photographs are not very much in themselves but are inter- 

 esting as being an application of the principle of what is known as ortho- 

 chromatic photography, i. e., they are taken on gelatine dry plates spe- 

 cially prepared so as to be more sensitive to yellow light than the ordi- 

 nary dry plates, and, in fact, by suitable arrangements, plates may 

 be made as sensitive to yellow as ordinary plates are to blue. Sach 

 plates are of the greatest use in copying paintings and other coloured 

 objects with a truer rendering of the light and shade as seen by the eye 

 than is possible by the ordinary plates. Being so sensitive to yellow 

 light photographs can be taken with them by petroleum or gas light and, 

 in some instances, with very great advantage. 



