Glacières or Freezing Caverns #272337

Many kind friends have given me information about glacieres or assistance in my work. I am especially indebted to Mr. Robert Butler, of San Jose, Cal.; Mr. F. H. Cushing, of Washington, D. C.; Professor Charles E. Fay, of Tufts College, Mass.; Professor Eberhard Fugger, of Salzburg, Austria; Mr. Alois F. Kovarik, of Decorah, Iowa; Monsieur E. A. Martel, of Paris, France; Mr. John Ritchie, Jr., of Boston, Mass.; Professor I. C. Russell, of Ann Arbor, Mich.; Miss H. Varena, of Wiesbaden, Germany; and Miss Mary Coxe, Mr. G. L. Farnum, Mr. J. E. Farnum, Mr. F. L. Garrison, Mr. W. C. Hall, Mr. E. I. H. Howell, Mrs. Horace Jayne, Mr. W. E. Meehan, Mr. C. J. Nicholson, Mr. G. B. Phillips, Mr. Bunford Samuel, Mr. W. W. Wagner, and Dr. W. H. Wahl, of Philadelphia. I wish to acknowledge also the help I have derived from the Bibliotheque Nationale and the library of the British Museum.