i'KOL!LF..MS AND i'RINCIl'LES OF MALARIA i'Kl£\liXTlU-\ . Iy9 



lectures, the co-operation of school teachers, mmisters of re- 

 li^S^ion, chambers of commerce and professional societies must 

 be secured, and their interest kept up. This is a most important 

 matter, if for no other reason than because only in that way can 

 the necessary legislation and public funds lie secured in a demo- 

 cratic community. 



I want to close with a word of advice to any community 

 contemplating- an anti-malaria campaign. 



Malaria prevention is a highly specialised field of sanitation. 

 In order to secin^e the best results at the lowest cost, it is essen- 

 tial that the planning and direction of the campaign be entrusted 

 to a competent man. Any man can build a l)ridge of .sorts — it 

 takes a good engineer to build a bridge that will be safe, and \'et 

 not cost an excessive amount of money. Malaria prevention on 

 a large scale is a costly undertaking. It may involve large 

 engineering operations, possil)l\- litigation, and a good deal of 

 0])position. It would be a great mistake to entrust such work 

 to a man who merch knows a few of the elements, and has not 

 had the requisite professional and practical training. Such a 

 man would more than likely spend an unreasonably large sum in 

 securing results, even if he did at all succeed in appreciably re- 

 durinof the incidence of malaria. 



Sir Henry RoSCOE.— The death of the Right Hon. 

 Sir Henry Enfield Roscoe, LL.D., D.C.L., F.R.S., on' the iSth 

 December, 191 5, at the age of S2, removes from the ranks of 

 contemporary men of science one who has justly been called a 

 great X'ictorian. Within a few days of each other Meldola and 

 Roscoe have suddenly passed away, the two men who hnd so 

 persistently and so vainly urged on the British Government and 

 the British jmblic the extreme undesirability of resting upon 

 extraneous sources for dyeing materia^ls and fine chemicals. 

 Like Lord Roberts, they had lived just long enough to see their 

 warnings abundantly justified. Roscoe's first chemistry teacher 

 was Balmain, the discoverer of boron nitride and inventor of 

 luminous paint. After studying chemistry at Lhiiversity College, 

 London, under Williamson, he went to Heidell:)erg University, 

 and l)ecamc a pupil of Bunsen. Roscoe liegan his thirty years' 

 association witli ( )\vens College, Manchester, in 1S57. when he 

 accepted the api)ointment of Professor of iTiemistry there. It 

 was there that he became associated with .^chorlemmer, and 

 together they published their classical ''Treatise on Chemistry" 

 in six viihnnes. When the Society of Chemical Industrv was 

 .started in icSSi, Roscoe became its first 1 'resident; in the follow- 

 ing year he was President of the Chemical Society, and in 1XS7 

 President of the British Association. 1 le was Vice-Chancellor 

 of London University from 1896 to 1902, and represented 

 South Manchester in Parliament from 1SS5 to 1S95. 



