Knowledge. 



THE "EYE" OF MARS. 



1.— Kaiser, 1862, October 24th. 

 4.— Hussey, 1892, August 17th. 

 7.— Williams, 1894, September 23rd. 



2.— Schiaparclli, 1877, September 26th. 

 5.— Guiot, 1892, September 6th. 

 8.— CamiueU, 1894, September 27th. 



3.— Schiaparelli, 1879, November 11th. 

 6. — Brenner, 1894, September 14th. 

 9. — Antoniadi, 1894, November 1st. 



Direct Photo EHyraving Co.^ 9, FarusbuiT/ Park, N, 



