926 



SCIENCE 



[N. S. Vol. XXVI. No. 678 



will soon be ready for distribution by the sur- 

 vey. This summary includes two tabular 

 statements that differ radically. Both give 

 the value of the mineral products of the 

 country in the years 1905 and 1906; but the 

 products of the whole country in their first 

 one gives the net value of the mineral 

 marketable form, excluding all unnecessary 

 duplication. The manufactured coke product, 

 for instance, amounting in 1906 to 36,401,217 

 short tons, is excluded, as it is represented in 

 the quantity and value of the coal used in its 

 manufacture, which are included in the coal 

 statistics. Similarly white lead, red lead, sub- 

 limed lead, zinc lead, litharge and orange 

 mineral, whose average aggregate value for 

 the last ten years has greatly exceeded $10,- 

 000,000, are not given in the table, the base 

 from which they are made being included in 

 the output of pig lead. The second table, 

 however, under the heading of " Output and 

 Value by States and Territories," gives the 

 value of both the raw material produced in the 

 region and of certain derivatives in their first 

 marketable condition. 



The Faculty of Medicine of Harvard Uni- 

 versity offers a course of free public lectures, 

 to be given at the new buildings of the Medi- 

 cal School, Long-wood Ave., Boston, Satur- 

 day at 8 P.M., and Sunday at 4 p.m., begin- 

 ning January 4, and ending April 26, 1908. 

 No tickets are required. Following is a list 

 of the lecturers and their subjects, with 

 dates : 



January 4 — " Some Recent Discoveries in the 

 Physiology of Digestion" (illustrated by lantern 

 slides and zoetrope demonstrations ) , by Dr. Walter 

 B. Camion. 



January 5 — " Human Gait " ( illustrated by lan- 

 tern slides), by Dr. Edward H. Bradford. 



January 11 — "The Modern Crusade against 

 Typhoid Fever," by Dr. Elliott P. Joslin. 



January 12 — " Common Salt," by Dr. Lawrence 

 J. Henderson. 



January 18 — " The Causes of Nervous and Men- 

 tal Disease," by Dr. Philip Coombs Knapp. 



January 19 — "Fatigue: Its Effects and its 

 Treatment," by Dr. George A. Waterman. 



January 25 — " Nervous Disorders of Children," 

 by Dr. William N. Bullard. 



January 26 — "Nervous Breakdown during Adol- 

 escence and Adult Life," by Dr. James J. Putnam. 



February 1 — " Some of the Nervous Disorders 

 of Adult Life, with Especial Reference to ' Hab- 

 its,' " by Dr. Edward W. Taylor. 



February 2 — " Popular Fallacies regarding In- 

 sanity and the Treatment of the Insane," by Dr. 

 Henry R. Stedman. 



February 8 — "Alcoholism and Insanity," by 

 Dr. Charles P. Bancroft. 



February 9 — " The Ear and the Telephone," by 

 Dr. Clarence J. Blake. 



February 15 — " The Interest of the Public in 

 Surgical Progress," by Dr. James G. Mumford. 



February 16—" The Sick Child," by Dr. Thomas 

 Morgan Rotch. 



February 22 — " The Causes of Disease in In- 

 fants and Children," by Dr. Charles Hunter Dunn. 



February 23 — " Rational Infant Feeding," by 

 Dr. John Lovett Morse. 



February 29 — " Syphilis : Its Nature and Dan- 

 gers," by Dr. James C. White. 



March 1 — " Smallpox and Vaccination," by Dr. 

 John Hildreth MeCollom. 



March 7 — " The Problem of the ' Nervous Tem- 

 perament' in Children," by Dr. George A. Craigin. 



March 8 — " Florence Nightingale and the Be- 

 ginning of Surgical Nursing," by Dr. J. Bapst 

 Blake. 



March 14 — " Modern Methods for the Care of 

 the Insane" (illustrated), by Dr. Owen Copp. 



March 15 — " The Relation of the Hospital to 

 the Community," by Dr. Abner Post. 



March 21 — "Mental Hygiene and the Preven- 

 tion of Insanity," by Dr. George T. Tuttle. 



March 22 — " Psychic Treatment of Disease : Its 

 Limitations and Uses," by Dr. Richard C. Cabot. 



March 28 — " What the People should know 

 about Tumors. Prospects of Cure of Malignant 

 Disease in the Light of Our Present Knowledge. 

 Importance of Early Cooperation on the Part of 

 the Laity," by Dr. Howard A. Lothrop. 



March 29 — " The Development and Maintenance 

 of Good Teeth," by Dr. Charles A. Brackett. 



April 4 — " The Inflammations due to the Com- 

 moner Pus Germs: their Local and General Ef- 

 fects. Blood-poisoning," by Dr. Charles A. Porter. 



April 5 — " Certain Dangerous Popular Delu- 

 sions concerning Grave Surgical Diseases," by Dr. 

 Maurice H. Richardson. 



April 11 — "Foods in Health and Disease," by 

 Dr. Maurice Vejux Tyrode. 



April 12 — " The Development of the Micro- 

 scope," by Dr. Harold C. Ernst. 



