1901.] LOWELL — SUPPOSED SIGNALS FROM MARS. 169 



Dec. 7, i6h. 4214m. Rather bright en terminator near north cap at P. A. 2383.0. 

 44m. Projection continues ; terminator otherwise regular. 

 46m. P.A. 183O.8. 

 51m. (After spell of seeing o) projection then of this form: 



(sketch). Height 1^ Th. 



P.A. 183O.9. 

 55m. Projection there ; flatter? 

 59m. Projection there; flatter? 

 17I1. 6m. Projection there (after spell bad seeing) (sketch) ; possible 



separation. Height \ l / z Th. 



P.A. i860. 2. 

 19m. Think projection is very small; at times thought it gone. 



Now Ys Th. (sketch). 

 22m. Projection certainly there ; I get this form : (sketch) Sinus 



Sibaeus ? Very low, say *^ Th. 



P.A. 185C.3. 

 30m. Think the projection has gone or else it is very slight ; if it 



is there its P.A is 186O.0. 

 35m. Projection undoubtedly gone. 



8. On the next night he found the terminator perfectly regular 

 until 15I1. 44m. S. M. T., when he recorded: Terminator regular, 

 but suspicious white N. of Icarium Mare. Icarium Mare is a name 

 given to the dark marking running lrom the forks of the Sabaeus 

 Sinus to the Hammonis Cornu, and formerly included under the 

 general designation of the Sabaeus Sinus. Four minutes later he 

 noted : Projection just started N. of Icarium Mare. There then 

 followed an almost exact repetition of the previous night's expe- 

 riences, as will be seen from the transcript of the observations. 



Record of December 8, 1900. 



Th. = thread ; P.A. = position angle. 

 1900. 



Dec. 8. I5h. 44m. Terminator regular, but a suspicious white N. of Icarium 

 Mare. 

 48m. Projection just started N. of Icarium Marc. 

 . 50m. At P.A. 186O.3. Ht % Th. 



All, so far, was with eyepiece .89. 

 I now put in ^ ep. 

 58m. Projection more conspicuous. Ht. % Th. 

 P.A. 184O.8. 

 i6h. 02^m. Projection. Ht. % Th. shows more easily in this ep. than .89. 

 16m. Projection at P.A. i87°.7 ; seeing good for limb and termi- 

 nator. 



PROC. AMER. PHILOS. SOC XL. 167. L. PRINTED FEB. 10, 1902. 



