5 Ti M in r 1 , 1915 



THE INDIA RUBBER WORLD 



657 



The Editor's Book Table. 



VHANDB tOPICAL GARDENING VND PLANTING. BY H. 



. ,11 | 



! Ion, III'; i. i lition, I'll Ceylon, H. W. I 



[Cloth, | 



THE author is ail authority of highest rank in man, i 

 taining to tropical agriculture and in this work pn 

 sents a well arranged compilation of reliable informa- 



tioi itch interest and value. The chapters are grot 



in Four sections Section 1 covers general conditions oi 



mate, soils, manures, propagat cultural operations, plans, 



implements and tools. Section 2 discusses thi fruit 



table varieties, spices, etc. Section 3 is devoted to tropical 



flowering plants and foliage trees, manj ol which arc of tin- 



So.MJ T » I'M \c, KXIVES IN I 



usual beautj and interest. Section 4 deals with tin- standard 

 cci iih imic i egetabli pi i idui I of Ceylon pi incipal 

 them being rubber, tea, cocoanuts, cocoa, rice and tobacco. 



It in, i\ be of interest to condense from the chapter devoted 

 to rubber which gives in detail all the essentials regarding 

 tin' usual methods or systems of tapping. The various kni 

 and pricking tools which are used fur making incisions of the 

 hark are illustrated. Different systems of tapping are em- 

 ployed because somt are better adapted than others to cei 

 i mi species and to trees of different ages. Nearly all are on 

 the system known as "herring-bone" or "half-herring-bone." 

 ih, latter sometimes is called the "half-spiral" system. In 

 case of the He ea tree the usual method is to mark the 

 circumference ol th< stem, up to about five feet from the 



into quarters One quartei at a time or alternate quai 

 tei "ii reverse sides may be operated on simultaneously. 

 I hi- area is marked of) usually with two wide V"s cut about 

 i foot 'pan v> lie ally, and joined by a vertical central chan 

 ii. I \ thin shaving, not less than 20 to the inch, is taken ofl 

 ih, lower side ol each cut every alternati daj oi so until the 

 intervening spaci of hark becomes too narrow or i hau tec 

 of latex, when the operation ma; !"■ repeated on a fresh 

 The tapping maj thus be extended ovet 

 almost the whole year, Eacl eding year the opp 



or adjacent quartei ma; be operated upon, the whole area thus 

 occup four to six years, b y which time the rem 



bark on the first quarter should be ready for retapping. The 

 special forms oi knives used are ed to prevent the in- 



cisiot, itir the cambium layer and thus produc 



knotted condition ol the stem. If the cambium be 

 much injured the life ol the tree will be affected 



The pro,.--- ol coagulation ol the latex is usual!. 



idditiou oi a little more than one per cent, of acetic 

 acid. The rubber quickly form- as a w< I floating n ass nid is 

 removed for machine wa nd making into the commer- 



cial forms of crepe, sheet or Wo tiring on plan 



tations is at present in an experiment 



I he rubber producing tree . hrub and climbers are de- 

 scribed and botanical!} catalo I ind much information is 



en , , mcei nin • the prim ip il pi eies. 



I hi ■ ork concludes with chaptei on mi cellam ous pi 

 n. t in . . i p. i , fungu diseasi etc I he author ha 

 dered an important service in the preparation of this hand- 

 book which is more I : I i". the in< >1 a good index. 



, : i ii mi, WIRE. By DRS, BENZ AND PRANK I 

 lished by the i ■ Deutsche B my. 



|K\ , , , , ,] | 



Thi- i- an interesting monograph on the manui d ap- 



plication- of insulated wires and cabli Vfter giving a brief 

 history of the use of rubber and gutta pi n ha for insulating wire, 

 ii describes chronologically the whole process of manufacture of 

 rubber and gutta percha insulated wires and cables, the p 

 ration of the raw materials, the impregnating of fabrics, in- 

 ulating mixtures; the machinerj nod in cable factories for in- 

 sulating both wire and cable; wrapping machines, insuli 

 machine . longitudinal cable rolling mills, etc.; the 

 testing of rubber and of gutta percha insulate, 

 and the manufacture of Okonite and other insulating 

 containing either rubber or gutta percha. This joint production 



of Messrs Benz and Frank should prove a valuable I I of 



reference to all interested in cables and insulated wire. The 

 is in German, 



PI RCH ING BY C. S. KIN ■,■ DJ II 01 'I HE 



' it, Purchasing Corporation. VIcGravc Hill Boole ' , , New 



k. 1915. 1 1 65 page $2 net.] 



Hitherto then- has been no literature i lii dequatelj with 

 the import. mi subject ,,i purchasing, considered in its funda- 

 mental relation-. This concise text 1 1 gi • leai resi 



tation of the author's views based on his practical experience 

 and comprehen sive tudj ol the problem. 



The subject is treated topically in ten chapt nning with 



how to obtain the right article and the importance oi 

 knowledge relating to its use, supply and manufacture. I he mat- 

 1.1 ol .iiiniii" at ih, lowest price calls for use of competitive 

 bids treated under various methods of tabulation and anal 



Prompt delivery, i i rdc i and expecting the impossible, 



and the value of the perpetual inventory are naturally grouped 

 for di-ciission. A brief chapter discusses making purchases 

 conform to a fixed policy. This is followed by chapters on Se- 

 curing Favorabli rerm Pei onal Characteristics and Qualifi- 

 cations; Strategy; Legal Aspects, and Depart lental Organ- 

 ization . . . n. hiding « ith a chapter c ,i Ei u 



The gist of marly every chapter is briefly and conveniently 

 summarized. 



I'm I i in igents who study this hook as it deserves can 

 not fail to be benefited by the intelligent views and practical 

 methods advocated by the author. 



INVESTOR'S HUE HOOK FOR 1915 EDITED n GEORGI 



Hole i . i [arke Revii I i tele" 



office m. [Boards, 108 pages; price, 5 shillings net.] 



The object of this work i to gi • ii nient form, all the 



essential details ce 700 important corporal d the 



7,500 which are quoted on the London and provincial 



exchanges, and in addition, the editor's opin these 



various companies and securities. This information is arranged 

 upon a uniform plan, and in alphabetical order by companies. 



\u attempt i o forecast the effect of the European 



war on the yiele urities. The British Government, it is 



ving on a 4 per cent, basis, sound indus- 



