vi CONTENTS. 
J. F. KEMP AND T. G. WHITE. 
Additional Notes on the Petrography and Distribution of Trap Dikes in 
the Region of Lake Champlain. The paper will appear in a subse- 
GENE VOLUME. 5.006.0-..ceeconsescedeviees sence, ealectedecsls sxcetesep meets eats 105 
J. F. KEMP. 
The Cripple Creek Gold Mining District of Colorado. (Public lecture).. 127 
The Great Quartz Vein at Lantern Hill, Mystic, Conn., and its Decom- 
position: (CA bstract) is 2. ssccsmeeenessscencssces soo scnencsaaamaee eae eee eee 189 
The Pre-Cambrian Topography of the Adirondacks. (Abstract).......... 189 
Zine and Lead Mines in Southwestern Virginia. (Abstract)............... 61 
WALLACE GOOLD LEVISON. 
Notes on Photographs of Geisler and Crooks radiant matter Tubes........ 156 
L. McI. LUQUER AND H. RIES. 
An Area of Augen-gneiss, near Bedford, N. Y. Published in The Ameri- 
can Geologist, October, 1806.0 .....62<ncs-cqdnewseconvosnenessesncuaeeseeeeeeeane 191 
L. McI. LUQUER. 
Notes on recent Accessions of Interesting Minerals................:esseeceeeees 127 
W. D. MATTHEW. 
The Metamorphism of Triassic Coals by Diabase Dikes at Egypt, N. C... 105 
A. M. MAYER. 
A Heliostat with Small Mirrors, Giving a Beam of Intense Light and 
Forming’ an Image’ abits POCuS... 0... 2.55.00. ,cencucncenusteecedeceuseeeeteenes 155 
A. New Polariscope sites. co saqasost Wvenes castocdccauaseteetaeestemestnenkeniee aes aan 135 
H. F. OSBORN. 
A Mode of Evolution Requiring neither Natural Selection nor the Inheri- 
tance’ of Acquired: (Characters)..s.2. ccc. -n+dsccnersssoscsecne seen eal seeeaeeeee 148 
G. A. POST, 
Photographs of the Lunar Eclipse of September 2, 1895...............se00e+ 63 
M. I.) PUPIN. 
Experiments with Xray Siccccccjscc-soc-scccsecsadescs do cescsetedassescte mete teeamers 136 
Maonetic CixGult. ..cciccstcccssccasecwontecesscesnersecadeie ents chess semen tents staan 7 
Roéntgen’s Discovery (Public Lecture). .....:.cccsecsseenea. waceseauaeanceneanen 146 
Communication of come New Results of Experiments with the Rontgen 
IRB YSivccsnsesscscisrecsvacsecesconbnscecdeaneaue vues dousnnes cen weaesslect sett ates teem 147 
J. K. BEES. 
Remarks on the Drawings made by Percival Sewell of the Markings on 
Ghe Planet: MAIS. ....<..0ccesesncsssecsccesveusscctusdiadesseceshavendensucecsscussper 64 
