October 9, 1914] 



SCIENCE 



509 



typographical errors and a line omitted by Manget 

 they agree word for word. 



The line referred to merely tells us that 

 Count Moritz had added Marcgrave to his ex- 

 pedition as his friend and associate. 



There is internal fvidenee in the sketch in 

 Manget which now clearly corroborates the 

 above, for in the last paragraph the writer 

 refers to " this man of most delightful memory 

 standing to me as an older brother." Now 

 also is made clear the dislike, amounting al- 

 most to hatred, of this writer for Piso, who 

 is charged with doing everything in his power 

 to enhance his reputation at the expense of 

 Marcgrave's, calling Marcgrave " my domes- 

 tic," minimizing his importance as a member 

 of the expedition, his work as a collector and 

 observer of natural objects, and his standing 

 as a scientific man. 



Exceedingly unfortunate is it that Christian 

 was never able to carry out his purpose ex- 

 pressed in these words: 



His [George's] Brazilian itinerary, if God will 

 so permit, I shall publish, because it contains an 

 exact description of his voyage to Brazil, together 

 with notes on winds, rains and calms. It will not 

 lack accounts of fishing and hunting with the bar- 

 barians, and geographical descriptions and notices 

 of places. 



By this is probably meant a publication of 

 George Marcgrave's journals, of which notice 

 is made in the body of Christian's sketch and 

 concerning which all the known facts are given 

 on page 254 of my paper (1912). This, how- 

 ever, he unfortunately never lived to do, for 

 the sketch was dated February, 1685, and he 

 died two years later in his seventy-fifth year. 



Of Christian Marcgrave I am able to give 

 only this small but interesting bit of infor- 

 mation. In my copy of the " Historia Natur- 

 alis Brasilia" by "William Piso and George 

 Marcgrave (Leyden and Amsterdam, 1648), 

 which bears as a book-plate a coat of arms and 

 underneath the word laetvaerenntdt and the 

 name of the maker of the plate, there are on 

 the fly leaf opposite the engraved title page 

 two short handwritten sketches in French, one 

 of Piso, the other of Marcgrave. At the close 

 of that on Marcgrave is found this interesting 

 statement : 



His brother Christian, born at Liebstadt in 

 Meissen, was made a doctor by the Faculty of 

 Medicine at Franeker in 1659, and occupied the 

 chair of pathology at Leyden until death overtook 

 him in 1687. "We learn that his two books printed 

 separately were afterwards united and published 

 under the title "Opera Medica Dnobus Libris 

 Comprehensa, " Amsterdam, 1715, in quarto. 



Lower on the same page is found, in the 

 same handwriting as the above, this sentence: 



Get ouvrage a et4 vendu 32 francs a la vente des 

 livres de M'' I'heritier. 



Franeker is a town in Friesland whose uni- 

 versity, founded in 1585, was abolished by 

 Napoleon in 1811. " Cet ouvrage " of course 

 refers to the "Historia Naturalis Brasilise." 

 There is nothing whatever to indicate who 

 this " monsieur the heir " was, whether heir 

 of the man of the book plate or of an earlier 

 or later owner. 



One more point may be added. In a recent 

 catalogue of Dulau and Co., of London, there 

 appeared in an advertisement of Piso and 

 Marcgrave's work the statement that the 

 figures were engraved by de Bray. No infor- 

 mation has been obtainable as to who de Bray 

 was or why he was chosen to engrave these 

 figures. That the work was very poorly done 

 an inspection of the " Historia Naturalis 

 Brasilia" shows. E. W. Gudger 



State Nokmal College, 

 Greensboro, N. C. 



TBE EFFECTS OF THE KATMAI ERUPTION 

 ON M AMINE VEGETATION 



Under an appointment as scientist in kelp 

 investigation in the United States Bureau 

 of Soils-^ the vsrriter visited the coast of south- 

 western Alaska in the summer of 1913. Dur- 

 ing June and July the coast of much of the 

 region affected by the eruption of Katmai 

 volcano in June, 1912, was visited. The events 

 attending this eruption have been described 



1 This expedition was a part of the general in- 

 vestigation of the fertilizer resources of fhe 

 United States carried on nnder the direction of 

 Dr. Frank K. Cameron, of the "[J. S. Bureau of 

 Soils. 



