282 
INDEX. 
Page 
Knight, Nicholas, Seme features in the analysis of dolomite rocks 127 
Lambert, John J., Regeneration in the crayfish 165 
Lichen flora of the ‘‘Ledges,” Boone county, Iowa 139 
List of authors, earliest dates and number of titles 37 
Lorenz, C. F., Stereoscopic projection in natural colors. . 75 
Martin, A. W. , A chemical study of Rhus glabra 171 
Method of determining chloric acid 150 
Miller, Katy A. , Lichen flora of the ‘‘Ledges,” Boone county 139 
Morrison, E. , New method of cohesion of water and adhesion of mer- 
cury apparatus 191 
Mueller, H. A., Preliminary list of the flowering plants of Madison county 261 
New deposit of Fuller’s earth 135 
New method of cohesion of water and adhesion of mercury apparatus. . 191 
Norris, K. W., The so-called dorsotrachealis branch of the seventh 
cranial nerve in Amphiuma 95 
Vagus and anterior spinal nerves in Amphiuma 98 
Note on the Carboniferous faunas of the Mississippi valley in the Rocky 
Mountain region 258 
Note on the position of Nileus vigilans in strata at Elgin, Iowa 179 
Pammel, L. H., Some bacteriological examinations of Iowa waters 111 
Periodical literature in Iowa on the subject of chemistry 162 
Preliminary list of the flowering plants of Madison county 261 
Presidential address by Bruce Fink * 11 
Proceedings of the Eighteenth Annual Session 1 
Pure food regulations 4 
Regeneration in the crayfish . . 165 
Remarkable occurrence of Aurichalcite 253 
Reprints 4 
Report of committee on pure food legislation 4 
Report of Secretary 1 
Report of Treasurer 2 
Savage, T. E., A buried peat bed and associated deposits in Dcdge 
township, Union county 103 
Sioux City water supply 135 
So-called dorsotrachealis branch of the seventh cranial nerve in Am- 
phiuma 95 
Some bacteriological examinations of Iowa waters Ill 
Some features in the analysis of dolomite rocks 127 
Stereoscopic projection in natural colors 75 
Vagus and anterior spinal nerves in Amphiuma 98 
