SCIENCE. -ADVERTISEMENTS. 



vii 



y4 TIMELT BOOK OF UNQUESTIONED AUTHORITT 



in which the results of the patient, minute observations 

 made through many years by the leading engineers of 

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 technicality, so that any one interested may understand the 



Problems of the Panama Canal 



Including the Physics and Hydraulics of the River Chagres, the Clima- 

 tology of the Isthmus, and the Cut at the Culebra. By BRIG.-GEN. 

 HENRY L. ABBOT (U. S. Army, Retired), Late Colonel Corps of 

 Engineers, Late Member of the International Comite Technique, and Con- 

 sulting Engineer of the New Panama Canal Company. 



NOW READY. Cloth, 12mo, $1.50 net (postage 12c.) 



" Our understanding of the Panama problem is materially bettered, by this volume.''^ 



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