58 



NATURE 



[May 17, 1900 



Microspheric Forms of Triloculina and Biloculina " {Proc. 

 ■Camh. Phil. Soc, vol. ix., pt. v.) ; with J. J. Fletcher, "On 

 the Condition of the Median Portion of the Vaginal Apparatus 

 in the Macropodidae'^ {Proc. Zool. Soc, vol. Ixiii., 1881, p. 976). 



Supplementary Certificate. 

 Author of *'Astroc/era W?7/iya«a, the representative of a New 

 Family of recent Sponges," in the Zoological Results of Dr. 

 Willey's Expedition, 1899. 



James Gordon MacGregor, 

 D.Sc. (Lond.), 1876. M A. (Dalh.) Professor of Physics, Dal- 

 housie College, Halifax, N.S. Well known for his long continued 

 Researches on Electrolytic Conductivity, on Solutions, on Re- 

 sistance of Metals, and on Thermo-electricity. Author of 

 numerous Memoirs contributed to the Royal Society of Edin- 

 burgh, the Royal Society of Canada, the Physical Society, and 

 the British Association, including the following : — " Note on the 

 Electrical Conductivity of SaUne Solutions "( Aw. Koy. Soc, 

 Edin., 1875); "On the Electrical Conductivity of Stretched 

 Silver Wires" (Hid., 1878); "On the \'ariation with Temper- 

 ature of the Electrical Resistance of certain Alloys " ( Trans. 

 Roy. Soc, Edin., 1880); "On the Measurement of the Re- 

 sistance of Electrolytes by means of Wheatstone's Bridge" 

 (Trans. Roy. Soc, Canada, 1882); "On some Experiments 

 showing that the Electromotive Force of Polarisation is inde- 

 pendent of the difference of Potential of the Electrodes " {ibid., 

 1883) ; " On a Test of Ewing and MacGregor's Method of 

 Measuring the Electiical Resistances of Electrolytes" [ibid., 

 1890, with Prof. Ewing) ; " Note on the Volumes of Solutions" 

 \Brit. Assoc. Report, 1877, with Dr. Knott) ; "On the Thermo- 

 electric Properties of Charcoal and certain Alloys, with a Sup- 

 plementary Thermoelectric Diagram" {Edin. Trans., 1879, 

 with Dr. Knott and Prof. Michie Smith) ; " The Thermo- 

 ■electric Properties of Cobalt" (1876, Proc. Roy. Soc, Edin., 

 1878) ; "On the Absorption of Low Radiant Heat by Gaseous 

 Bodies" (/^/V/., 1882-83); " On the Resistance to the Passage 

 of the Electric Current between Amalgamated Zinc Electrodes 

 and Solutions of Zinc Sulphate " ( Trans. Noz'. Scot. Inst. Nat. 

 Set., 1^83); "On the Density and the Thermal Expansion of 

 Solutions of Sulphate of Copper" {Trans. Roy. Soc, Canada, 

 1884); " On the Relative Bulk of certain Aqueous Solutions 

 and their Constituent Water" {Trans. Nov. Scot. Inst. Nat. 

 Sci., 1886); "A Table of Cubicle Expansions" {Tra7is. Roy. 

 6"^^., Canada, 1888); "On the Variation of the Density with 

 the Concentration of Weak Aqueous Solutions of certain Salts " 

 (ibid., 1889, vol. ix., 1891) ; "On the Calculation of the Con- 

 ductivity of Electrolytes" (?(^?rf., 1896); "On the Relation of 

 the Physical Properties of Aqueous Solutions to their State of 

 lonisation" {P/ii/. Mag., 1897); "On the Hypothesis of Ab- 

 stract Dynamics and the question of the number of Elastic Con- 

 stants " {ibid., 1896, with Mr. E. A. Archibald) ; " On Calcu- 

 lation of Conductivities of Electrolytes " {/bid., February 1898). 

 Author of "An Elementary Treatise on Kinematics and 

 Dynamics" (1887). 



Patrick Manson, 



C.M.G., M.D. (Aberd.). F.R.C.P. (Lond.). LL.D. (Aberd.). 

 Physician and Medical Adviser to the Colonial Office. Lecturer 

 on Tropical Medicine, St. George's Hospital, Charing Cross 

 Hospital and London School of Tropical Medicine. Dis- 

 tinguished as a Physician and Parasitologist. Discoverer of 

 Filarial Periodicity of the ro/e of the Mosquito in Filarial Meta- 

 morphosis ; of Filarial Ecdysis ; and of many other points in 



-connection with the life-history of the Filaria noclurna. Dis- 

 coverer of three other blood-worms of man, viz. Filaria ditima, 

 Filaria perstans and Filaria Demarquaii. Discoverer of the 

 disease known as Endemic haemoptysis and of its Parasitic cause. 

 Discoverer of Boihriocephalus Mansoni and of many points in 

 connection with human and animal helminthology. Was the 

 first to describe accurately and to name Finea imbricata, and to 

 prove experimentally its dependence on a vegetable parasite. 

 Was the first to point out the significance of the flagellated body 



-as the initial stage of the extra-corporeal cycle of the malaria 

 parasite, and to enunciate the hypothesis that the mosquito was 

 the host of the parasite at this stage, and therefore an active 



•agent in diffusing malaria, an hypothesis since proved by Major 



Ross to be correct. Author of a work on Filaria sanguinis 



hominis and some Parasitic Diseases of Warm Climates, 1883 ; 



•of " Tropical Diseases," 1898 ; of the Goulstonian Lectures on 



NO 1594, VOL. 62] 



the Life-History of the Malaria Parasite Outside the Human 

 Body, 1896 ; of Papers on the Metamorphosis of Filaria 

 sanguinis hominis in the Mosquito {Trans. Linn. Soc, 1883) ; 

 "On the Nature and Significance of the Flagellated Body in 

 Malarial Blood" {Brit. Med. [ourn., 1894); and of many 

 other papers on the subjects mentioned above and allied 

 matters. 



Thomas Muir, 



LL.D., M.A., F.R.S.E. Superintendent-General of Education 

 in the Cape Colony. Distinguished as a Mathematician and 

 Educationist. Author of "A History of Determinants," and 

 fifty-eight original mathematical papers, including "Continu- 

 ants: a New Special Class of Determinants" {Proc. Roy. Soc 

 Edin., 1875) ; -"On the Transformation of Gauss' Hypergeo- 

 metric Series into a Continued Fraction" {Lond. Math. Soc, 

 1876); "New General Formula for the Transformation of 

 Infinite Series into Continued Fractions" {Trans. Roy. Soc 

 Edin., 1876); "On Eisenstein's Continued Fractions" (z'3/(/., 

 1879)) "On a Systematic Determinant connected with 

 Lagrange's Interpolation Problem" {L.ond. Math. Soc. Proc, 

 1 88 1 -2) ; " On New and Recently Discovered Properties of 

 certain Symmetric Determinants" {Quart. Jou7n. Math., 

 1882) ; " On the Phenomena of ' Greatest Middle ' in the Cycle 

 of a Class of Periodic Continued Fractions" {Proc. Roy. Soc 

 Edin., 1884) ; " The Theory of Determinants in the Historical 

 Order of its Development" {ibid., vol. xiii.-xvi.) ; " On Some 

 Hitherto Unproved Theorems in Determinants" {ibid., 1891) ; 

 "A Problem of Sylvester's in Elimination " («/^/(/., vol. xx.) ; 

 " New Relations between Bipartite Functions and Determin- 

 ants, with a Proof of Cayley's Theorem in Matrices" {Lond. 

 Math. Soc. Proc, vol. xvi. ). Has rendered services of the 

 highest importance to education in the Cape Colony, and in his 

 capacities of trustee of the South African Museum and member 

 of the Geological Commission has greatly promoted original 

 scientific research in South Africa. 



Arthur Alcock Rambaut, 

 M.A., Sc.D. (Dublin). Radcliffe Observer. Late Royal 

 Astronomer of Ireland. Late Andrews Professor of Astro- 

 nomy in the University of Dublin. Author of the following 

 researches in Astronomy and Physics : — Catalogue of the Mean 

 Places of loi 2 Southern Stars " ("Astronomical Observations 

 and Researches of Dunsink," part vi.) ; "Catalogue of the 

 Mean Places of 717 Stars" (part vii., ibid.); "On the Deter- 

 mination of Double Star Orbits from Spectroscopic Observa- 

 tions of the Velocity in the Line of Sight " {Monthly Notices, 

 Roy. Astron. Soc, vol. li., No. 5) ; "To Adjust the Polar Axis 

 of an Equatorial Telescope for Photographic Purposes " {ibid., 

 liv.. No. 2) ; " On the Inequality in the Apparent Diurnal 

 Movement of Stars due to Refraction, and a Method of Allowing 

 for it in Astronomical Photography" {tbid., vol. Ivii., No. 2) ; 

 " On a Geometrical Method of Finding the most Probable 

 Apparent Orbit of a Double Star" {Proc Roy I. Duhl. Soc, vol. 

 vii., part 2); " On the Distortion of Photographic Star Images 

 due to Refraction " {ibid., vol. viii., part 2) ; "On the Rotation 

 Period of the 'Garnet' Spot on Jupiter " {ibid., vol. viii., part 

 5); "On the Relative Positions of 223 Stars in the Cluster 

 X Persei, as Determined Photographically " (in conjunction with 

 Sir R. Ball) {Trans. Roy. Lrish Acad., vol. xxx., part 4) ; 'f On 

 the Possibility of Determining the Distance of a Double Star by 

 means of the Relative Velocity of the Components in the Line of 

 Sight" {ibid., 2nd series, vol. iv.. No. 6) ; " The Absorption of 

 Heat in the Solar Atmosphere " (in conjunction with W. E. 

 Wilson) {ibid., 3rd series, vol. iii., No. 4). 



William James Sell, 

 M.A. Senior Demonstrator of Chemistry, University of Cam- 

 bridge. Author of the following papers : — " Volumetric Deter- 

 mination of Chromium "( ZV-awj. Chetn. Soc, 1879); "On a 

 Series of Salts of a Base containing Chromium and Urea," 

 Nos. I and 2 {Proc Roy. Soc, 1882 and 1889); " Anhydro- 

 Derivatives of Citric and Aconitic Acids" {Trans. Chein. Soc, 

 1892) ; " Salts of a new Platinum Sulphurea Base " {Brit. Assoc. 

 Rept., 1893) ; " Studies on Citrazinic Acid," Pts. I.-V. {Trans. 

 Chem. Soc, 1893-1897) ; "Note on the Action of Chlorine on 

 Pyridine "( 7>a«x. Chem. Soc, 1898); " The Chlorine Deriva- 

 tives of Pyridine," Pts. I. -II. {zbid., 1898); " Interaction of 

 Ammonia and Pentachlorpyridine " {ibid.); "Constitution of 

 Glutazine " {ibid.). 



