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ininister without pastoral diarge, in order to have more time at 

 MS disposal lor his sdeiititic studies and researclies ; these and 

 his lectures on microscopical and biological subjects, occupied the 

 greater part of the last Iwenty-oue years of his life, but of lare 

 years he was greatly hampered by failing health. One of these 

 lectures which was delivered in 1884, before the British Associa- 

 tion at Montreal, was famous at the time : it was on -The lowest 

 and smallest forms of animal life." 



Dv Dallinger was elected F.Il.S. in 188U, and received the 

 ijLD. from the A ictoria University in 18S4, the D.Sc. from 

 Uubhn m 1892, and the D.C.L. from Durham in ]89fi ; he was 

 ,c'w?^\^ol*''^^^^>'^'^ ^ricroscoj.ical .Society of London from 

 J884tol88/ inclusive, and of the Quekett Microscopical Club 

 irom lS90to 1892 inclusive ; he was also senior lecturer on the 

 staff ot the Gilchrist Educational Trust, lie was a Fellow of 

 the Linnean Society from 2nd March, 1882, until the time of his 

 death, and served on the Council from 1888 to 1890. 



From early youth Dallinger took a strong interest in natiu-al 

 science, but the researches which established his position in the 

 scientific world, and eventually made his name famous, commenced 

 in 1870, and lasted for about ten vears ; thev were microsco|)ical 

 researches on the life-histories of certain minute septic organisms 

 known as "Monads." The results of these researches were pub- 

 lished, from time to time, chiefly in the ' Monthly Microscopical 

 Journal,' which was at the time the journal of the Eoyal :^Ii<ro- 

 scopical .Society. The earlier of the"se researches were conducted 

 in conjuncn-on with J. Drysdale, M.l)., and were marvels of 

 patient and skilful investigation : the life-histories were traced 

 and established by continuous watching through the microscope 

 day and night \Aithout a break ; one observer sitting down to 

 the instrument as the other rose, mitil the whole life-history had 

 been thoroughly traced and verified. The question of spontaneous 

 generation was then a burning one, and the results of jNIessrs. 

 Dalhnger and Drvsdale's enquiries and experiments had consider- 

 able infiuence in determining the couclusious at which the greater 

 part of the scientific world arrived. Some of the later reseiirchea 

 into the thermal death-point of known Monads and Monad-germs 

 were conducted by Dr. Dallinger alone, w ithout Dr. Drys'dale's 

 assistance ; his careful and prolonged exj^eriments proved that 

 these^ Flagellates, which normally lived at a temperature of about 

 60° ¥., could, by a gradual raising of the temperature of the fluid 

 in which they were immersed, be accustomed to live and thrive at 

 ISS'' y. The joint experiments had already proved that the germs 

 were capable of resisting a fluid heat of 220° I\,ai!d a dry heat of 

 300° F. 



The enquiries above referred to were probably Dr. Dalliuger's 

 only original investigations and discoveries of im'portance in'bio- 

 logical science ; but in the course of them he had to employ the 

 highest powers of the microscope, and to use them to the best 

 advantage, as the flagella of living monads are difiicult objects to 



