CONTENTS. vii 
PAGE 
M. I. PUPIN. 
A New Form of Vacuum Tube, and a New crete hance Current 
Snterruptor...:-......... . 44 
Vacuum Byeeharces wid fics Henne 0 on iihe Electrical nneore of the 
Solar Corona............ eeeoepenieas Pecneos ora al fi 
Further ienerimeneel in Ganaieetion with beaeetin rvineiav ec seenecs oA 
A. L. RAWSON. 
The Ancient Inscription on a Wall at Chatata, Tennessee.................. 26 
J. K. REES. 
BEEP NOTRE ESTE SUTTACE <0. canica~ van'eoccoucecwevscsiece ses vedceceseusnieerenecs, 49 
Ancient Astronomical Tretadmenta:: see pane reaieecse LOG 
Report of Observations on the Gener of 1892 (Swifty what at the 
Waloninia College Observatory «v.55 ceo -ccers csjereses s-nesscarcecasisescetess 120 
HEINRICH RIES 
mhe Clays of the Hudson River Valley.......-.--5:.1s oc. sessedeecsevcdecontessevass 30 
JOHN TATLOCK, JR. 
Remarks on the Aurora of February 13, 1892.................000---seeeeeee see 105 
Cc. H. TYLER TOWNSEND. 
Catalogue of the Described South America Species of the ee 
Muscide.. Beas ed an neices sartenwier a celsns ens ioeiley sinsuists does delete “Ru accausiesetevect lal 
W. P. TROWBRIDGE. 
The Mandibles of the Hudsonian Godwit............02....cseseseesseseseeseesees 80 
H. T. VULTE. 
SaMITENE CITC ONL LESUNT Mien c oreinn oi anicdp nea sch cay <a-'cch ade cep set edn dei oetiess'saceeecns ous sss LOO 
DeapMEBA CAIDA LTD EEY cas crntepainctien Gen aee astixae sea.cou'sceisae cewtene evtihasinan'secNAdlea-‘spnden verses], OO 
H. T. VULTE AND D. W. WARD. 
The Natural Dyes as applied to Wo0].........:..s:eccceseesaeeceseeseesee eee 48, 157 
F. G@. WIECHMANN. 
Sucrose, Dextrose, and Levulose; their Quantitative Determination 
RO ILOFE CEUEEINE® COP CUNOE re cencteieee cep coclcre nes esecusinse ave Sunoco cae ccaeacsuases) LOG 
