Knowledge 



THE HOURGLASS SEA ON MARS. 



1.— Dawes, 1864, November 26th. 

 4.— SciiiArAiiELi,T, 1888, June 2nd. 

 7. — Lowell, 1894, October. 



2. — Flammariox, 1S73, .Tune '29tli. 

 ."). -ScHiAPAEELH, 18fe0. June 20th. 

 8.— Phillips, 1806, Dec-ember 3rd. 



3 — ScHiAPAEELLi, 1879, October 2Sth. 



6. - Gale, 1892, August 6th. 



9. — JSTONIADI, 1896, December 7th. 



