It is not our purpose to draw aside the curtain that 

 separates his scientific and public life from the sanctity of 

 his home-life. At present we feel that we have no right 

 to enter the home and to paint the picture of the peace 

 and happiness of that home circle, where, surrounded by 

 wife and children, he, in perfect security and the loving 

 trust of a well spent life, calmly awaits the summons that 

 shall bid him move to another home. Sometime it may 

 be our duty and pleasure to draw the picture of his home 

 life and to write more fully of his scientific life, but the 

 time is not yet come, and it may be that other and better 

 pens than ours may perform this duty, but none would 

 bring to its accomplishment more loyal labor. Until 1871 

 Dr. Cooper was in the active practice of his profession, 

 when his health failing, he moved to Ventura County, 

 California, and remained there engaged in collecting un- 

 til in 1875 he moved to Hayward, California, where he 

 now resides. 



Thus far we have carried a brief, running itinerary, as 

 it were, of his scientific life, recounting his movements 

 until the time that he moved to Hayward, at which it is 

 our purpose to leave this view of his life, and take up the 

 purely scientific portion and his publications. In 1858 

 Dr. Cooper was made a member of the New York Ly- 

 ceum, now New York Academy of Sciences. Although 

 not one of the charter members of the California Academy 

 of Sciences, he is one of its early members, and until fail- 

 ing health prevented, one of its earnest and active work- 



