June 30, 1911] 



SCIENCE 



995 



ing long experience with Bordeaux injury, a 

 personal experience that is certainly far more 

 extensive than that of Dr. Orton. I quote 

 here a recent letter from Hedrick bearing on 

 this point. 



I have just gone over the description you give 

 of bordeaux Injury in your ' ' Diseases of Eco- 

 nomic Plants" and in my bulletin on the subject. 

 I can find nothing whatever to criticize in the 

 statement you make in regard to this trouble. I 

 may say that since my bulletin was published, I 

 have had occasion to give a good deal of attention 

 to Bordeaux injury and do not believe that I 

 would now describe it differently than when the 

 bulletin was written. My colleague, Professor 

 Stewart, whom of course you know, and who has 

 also given Bordeaux injury a good deal of atten- 

 tion, has just looked over your description and 

 finds nothing to criticize in your discussion of the 

 injury in question. 



It is gratifying to linow that in these " more 

 serious errors " the text of the book does not 

 deviate widely from a basis, founded on ex- 

 ceedingly good authority, authority in some 

 instances, most instances in fact, as trust- 

 worthy as that of our critic. 



Dr. Orton was requested to read and criti- 

 cise the manuscript of our book prior to its 

 publication. This he, with apparent willing- 

 ness, agreed to do. The manuscript of a large 

 portion of the book, including most of the part 

 under discussion, was submitted to him and 

 certain criticisms were received, some of 

 which were accepted, some not, according to 

 the judgment of the authors. For all of this 

 the authors are grateful to Dr. Orton. 



That Dr. Orton is much more aggressive 

 and much more searching in this recent public 

 criticism, after puhlication, than in his pri- 

 vate criticisms prior to publication may, how- 

 ever, be shown by two quotations as well as by 

 many other adduceable facts. 



Prom letter February 16, 1910, " you al- 

 ready have a discussion of the most important 

 non-parasitic diseases." 



From review in Science, April 21, 1911, 

 " The wilt and die back of the orange are 

 omitted, as is the curly top of beet, one of the 

 two most important maladies of that crop." 

 F. L. Stevens 



SCIENTIFIC BOOKS 

 The Stone Age in North America. By War- 

 ren K. MooREHEAD, A.M. Two volumes of 

 874 pp., 7 in. by 9| in., 17 plates, 4 of which 

 are colored, and 735 figures in the text. 

 Boston and ISTew York, Houghton MifRin 

 Co. 1910. 



This is the most ambitious work yet pro- 

 duced on the prehistoric implements of the 

 United States. The hook deals almost wholly 

 with this area, although Ontario and a few 

 other sections of the Dominion of Canada are 

 briefly covered. Mexico and Central Amer- 

 ica with their highly developed stone age cul- 

 ture are omitted. 



The opening chapters deal with the classifi- 

 cation of stone implements according to form 

 and material; with quarry sites and methods 

 of quarrying; the making of projectile points 

 and knives; the cached deposits of finished 

 and incomplete implements; and the general 

 distribution of types. Stone chipping in 

 America had reached a high degree of excel- 

 lence, and some of the finer examples from 

 California, Tennessee and Ohio are probably 

 not surpassed in workmanship by those of 

 any section of the world. 



The author next describes what he calls the 

 celt-hatchet-axe-adze class of implements 

 which includes adze blades of various types 

 and the grooved and grooveless axe. They are 

 shown in great variety. The remainder of the 

 first volume is devoted to problematical forms. 

 Under this general head are figured and de- 

 scribed flat stone pendants, perforated tablets, 

 winged ceremonials, " spud "-shaped objects of 

 slate, pear-shaped pendants, discoidal stones, 

 circular discs for paint, stone tubes, and other 

 types. Nearly nine hundred of these objects 

 are illustrated from photographs furnished 

 principally by collectors. 



The second volume opens with a chapter on 

 bird stones and other effigies. This is fol- 

 lowed by a treatise on the tobacco pipe. Be- 

 ginning with the early tubular type a large 

 variety is shown ranging through the simple 

 curved and angular forms to the platform and 

 effigy pipes. 



