352 



THE INDIA RUBBER WORLD 



[July i, 1909. 



for either of these resins. Within a year Pontianak resin 

 has been offered in the crude wet state as low as $15 per ton, 

 but the dried is usually quoted at 3 cents per pound in bags, 

 although the purified and deodorized article suitable for 

 chewing gum is held as high as 28 cents per pound. Guayule 

 resin is quoted at 2 cents per pound. 



While the above record is mostly one of failure in the 

 utilization of resins derived from rubber, it is of value as 

 showing what has heretofore been done along this line, and 



others need not waste eflfort on the same lines. It must be 

 remembered, however, that the reason for the deresination 

 of rubber is that the characteristics of the resins are un- 

 desirable by rubber manufacturers, and it is not surprising 

 that they should be found undesirable in other industries. 

 Everything has its place, but the place for the resin is not 

 in the rubber, and the principal object of deresination is to 

 improve the rubber. 



New York, June i8. 1908. 



The Editor's Book Table. 



THE MANUFACTURE OF RUBRER GOODS. A FRACTICWL HAXD- 

 book for the Use of MaTiiifacturers. Chemists, and Others. By Adolph 

 Heil and Dr. \V. Esch. English Edition by Edward W. Lewis, a. c. g. 

 I., F. c. s. - ■ - London: Charles Griffin & Co., Limited. Phila- 

 delphia: J. B. Lippincott Co. 1909. [Ooth, 8vo. Pp. VTII + 237. 

 Price, $3.50.] 



MANUEL PRATIQUE DE LA FABRICATION DU CAOUTCHOUC 

 ct des Produits qui en Derivent. Par Ad. Heil et Dr. W. Esch. 

 Traduit de I'AUemand par E. Ackermann. Paris: Ch. Beranger. 1909. 

 [Paper. 8vo. Pp. 283. Price 12.50 francs.] 



THE general scope of this work was treated in a review of 

 the original edition, in German. [See The India Rubber 

 World, July i, 1907 — page 307.] The preface to the 

 English edition, just now brought out, states that the late Dr. 

 C. O. Weber had promised a companion book — in the shape of a 

 comprehensive treatise on the manufacture of rubber goods — 

 •to his standard work, "The Chemistry of India-Rubber," but 

 this was prevented by his lamented death. Later, when the Ger- 

 man book "Handbuch der Gummivvarenfabrikation," by Drs. Heil 

 and Esch appeared, the publishers of Dr. Weber's book realized 

 the utility of an English edition, which has been prepared by 

 the chemist of a long-established rubber factory in London. The 

 work embodies a concise account of the sources of the raw ma- 

 terial and of its treatment through the various stages of prep- 

 aration in the factory, and the manufacture of the leading kinds 

 of goods. The text is supplemented by upward of 100 illastra- 

 tions. So far as machinery is concerned the types illustrated are 

 mainly German, but the editor has so modified the original work 

 as to adapt the text to the factory equipment and processes more 

 generally in use in Great Britain and America. 



Regarding the compounds ("Die Mischungen") the authors 

 say : "No claim is made that these mixings are possessed of any 

 general importance, as they can of course be modified in a great 

 variety of ways." In the review in these pages of the original 

 edition it was said : "The importance of proper compounds is 

 nowhere lost sight of, and nearly a hundred typical mixtures are 

 given in the book. Of course a book of compounds alone will 

 not make a rubber factory superintendent any more than a 

 'cook book' will make a chef ; still, before making up rubber 

 goods one must know what to put into them, and an idea of 

 what proportions have proved successful in practice is helpful." 



It may be worth while to consider to whom a book of this 

 class may be of interest or value. The rubber manufacturer 

 who possesses a practical knowledge of the industry or the ex- 

 perienced factory superintendent or chemist may not require such 

 a work as a guide in his work, but we take it that there is no 

 one who is so expert in the industry as to be unable to learn 

 something from the result of the studies of such practical men 

 as the authors of this work. Such a book also tnay be of in- 

 terest to a man who is interested actually in one branch of the 

 rubber industry, and who may wish to improve his knowledge of 

 other branches. Likewise it may be commended to the beginner 

 in the industry who may be interested in looking beyond the 

 routine tasks set before him, in the desire to know more of 

 what the rubber manufacture embraces than he is able to see in 

 his daily work. 



One indication of the esteem in which this book is held is the 



fact tliat it has appeared in a French edition, the title of which 



is stated above. 



ZIELE. RESULTATE UND ZUKUNI^' DER INDISCHEN FORST- 

 wirtschaft. Inaugural-Dissertation zur Erlangung der Doktorwurde einer 

 Ilohen .Staatswissenschaftlichen Fakultat der Eberhard-Karls-Universitat 

 zu Tubingen. \^orgelegt von A, H. Berkhuut aus Wageningen (Holland). 

 Tubingen: G. Schnurlen. 1909. [Paper. 8vo. Pp. v-{-i9o.] 



This thesis, for a doctor's degree from the university of 

 Tubingen, Germany, on the aims, results and future of forest 

 economy in India, is by Mr. A. H. Berkhout, late conservator of 

 forests in Java, in which position he studied the principal india- 

 rubber and gutta-percha species. In the work before us no less 

 than 33 pages are devoted to the culture of these species, prin- 

 cipally in the Far East. 



From a Review by E. De Wildeman. 



"In his conclusion Professor Berkhout states that it will be 

 necessary for the head forester to receive his education in Europe 

 and, after having acquired a broad general knowledge of his 

 science, he should commence to practice his difficult profession 

 in the tropics and that he should attempt to carry out its ap- 

 plication along new paths. As our author states, those govern- 

 ments which are at the head of colonial forests have an interest 

 in sending out well-instructed foresters, for it will only be by 

 doing so in a methodical manner that it will be possible to 

 make the forests regularly productive. Professor Berkhout con- 

 siders, and justly so, that the science of colonial forestry will 

 from day to day play an important role in the national economy 

 of all civilized countries. Dr. Berkhout's book contains, as might 

 be judged, considerations and very general information which all 

 colonial governments might make use of; the well-known ability 

 of the Wageningen professor lends particular weight to his ob- 

 servations." 



DIE NUTZPFLANZEN UNSERER KOLONIEN UND IHRE WIRT- 

 schaftliche Bedeutung fiir das Mutterland. Von D. Westermann. - - - 

 Berlin: L">ietrich Reimer (Ernest Vohsen). 1909. [CJoth. 8vo. Pp. 

 94 -h 36, colored plates. Price, 5 marks.] 



Nowhere is the development of colonial resources carried on 

 with greater system and more energetically than in the depend- 

 encies of Germany in Africa. This compact, but at the same 

 time very cornplete, work on the useful plants in those colonies, 

 and their economic importance to the mother country, devotes 

 not a little space to rubber yielding species, from which the 

 various colonial administrators evidently hope for large ultimate 

 returns. The rubber plants described in this volume include 

 Kickxia clastica, Manihot Ghciovii, Ficus clastica, Hevea 

 Bnisiloisis and Palnquium giitta — of all of which illustrations are 

 given colored to nature — and several others. The list of species 

 treated, however, is limited chiefly to those which have been 

 placed under cultivation in the German colonies. 

 IN CURRENT PERIODICALS. 



Zur Kenntnis des Milchsaftes von Kickxia Africana. By Dr. E. Ficken- 

 day. — Der Tropeiipfan:er, Berlin. XIII = s (May, '09). Pp. 203-208. 



Le Clitandra ortentalis dans la Giiinee Francaise. Coagulation de son 

 latex. By Aug. Chevalier, = Journal d'AgricuHure Tropicale, Paris. 

 IX-95 (May 31, '09). Pp. 129-131. 



L'Origine Eotaninue du Caoutchouc de Nouvelle-Caledonie. By M. Du- 

 bard. = Journal d'AgricuHure Tropicale, Paris. IX-95 July 3'> '°9)- 



Rubber of Sapium Jciufiatji from British Guiana. [Description and 

 analysis.] = Bulletin of the Imperial Institute, London. VII-l (1909). 

 Pp. 1-7. 



