Vill CONTENTS. 
LECTURES OF THE PUBLIC COURSE OF 1890-91. 
November 24, 1890. 
FREDERICK H, CHAPIN, ESQ. 
PAGE 
Cliff Dwellings of the Mancos Cafions..... ........seeeeemeei eee 44 
December 15, 1890. 
H, CARRINGTON BOLTON, PH.D. 
Life and Scenes in the Hawaiian Islands.............-. sscaccevees 47 
January 19, 1891. 
PROF. A. J. DUBOIS, 
SS CLOM COAL MITA CIO settee scie recs, <i ajs s:s.s eis of vaieie| cece ele te oe eRe sive Cea CO 
February 16, 1891. 
W. GOOLD LEVISON. 
Instantaneous Photography as an Aid to Science, History,and Art. 66 
March 16, 1891. 
PROF, CHARLES SPRAGUE SMITH. 
The Orkneye/and: Shetland s...)0i.3)c05;s «2 xn s/ace o's pen oh exelent eens 109 
April 20, 1891. 
FRANCIS B. CROCKER, E.M, 
Practical Applications of Electricity............ o | ai sie/etcteteiiie ae 116 
May 18, 1891. 
CHARLES F. COX, A.M. 
Via be PaRIALOMa gee nin ctec aisye oldie cleeatdceisctecte oa. @ wleverepetetetetenmetee 119 
