Eoberts 



Robertson. 



1057 



Cambridge, Phil. Soc. Proc: Discussion of 

 a difference equat. relating to the tension of 

 overhead wires supported by equidistant po- 

 les, 12 S. (15, 1910). 



Messenger ot Matli. : Proof of one of Peano's 

 axioms of the straight line, 3 & 1 S. (42, 

 1912/13). 



Phil. Mag.: The conduct. of electricity 

 through gases betw. parallel plates, 5 & 13 S. 

 (10, 1905). — On a graphical solut. of a class 

 of differential equations occurring in wireless 

 telegraphy (m. E. V. Appleton), 10 S. (43, 22). 



Roberts, Alexander, D. Sc. Kap- 

 stadt; stud. Edinburgh; errichtete 1891, 

 Lovedale, Süd- Afrika, eine Privatsternw. 

 z. photometr. Beob. d. Sterne; * 1857, 

 Dez. 4, Farr, Southerlandshire, Schott- 

 land. (Eig. Mitt.) 



Erfindgn. : Prismatisches Aquatorial-Femrohr 

 z. Beobaehtg. v. veränderl. Sternen. — Ro- 

 tierender Doppelspiegel auf Universalständer z. 

 Vergleichg. v. Sternfeldem. 



Astron. Nachr.: Orbit of a Centauri, HS. 

 (133 & 139, 1893 & 96). — Mass, proper mo- 

 tion & Position of a Centauri, 6 S. — Parallax 

 of a Centauri fr. meridian observations 1879 — 

 81, 13 S. — Systematic variat. in the difference 

 betw. the declinat. of aa & «i Centauri, 4 S. — 

 Position & parallax of ß Centauri, 4 S. (139, 

 96). — Position & proper motion of ß Centauri, 

 4 S. (142, 97). 



Boston. Astron. Journ.: Graph, solut. of 

 the orbit of Sirius, 2 S. (14, 1895). — The eli- 

 minat. of position-error in the observ. of var.- 

 stars, IS. — Southern Algol-var., 2 S. — LAC. 

 5861 : Short-period variable, class II, 6 S. (16, 

 96). — South, short-period var., 1 S. (20, 1900). 



Chicago, Astrophys. Journ.: Density of 

 closc double stars, 7 S. (10, 1890). — Close bi- 

 nary Systems & their relat. to short period va- 

 riats., 10 S. (2, 95). — Cert. considerats. con- 

 ceming the accuracy of eye-estimates of magni- 

 tude by the methoa of sequences, 12 S. — Me- 

 thod of determining the value of the light ratio, 

 9 S. (4, 96). — The orbits of the Algol variables 

 RR Puppis &V Puppis, 15 S. (13, 1901). —The 

 variat. of S Arae, 20 S. (33, 11). — An inquirv 

 into the variat. of the spectroscopic binary k 

 Pavonis, 9 S. (34, 11). 



Edinburgh, Roy. Soc. Proc: Certain consi- 

 derats. regarding Algol variat. with special 

 reference to C. P. D. —41 "•4511, 14 S. (24, 

 1901—03). 



London, Astron. Soc. Month. Not.: Investi- 

 gat. conceming the position error affecting eye- 

 estimates of Star magnitudes, 9 S. — ftoper 

 motion of the southem short period variable 

 LCarinse & K Pavonis, 1 S. (57, 1897). — 

 Further investigat. conceming the position 

 error affecting eye-estimates of star magni- 

 tudes, 7 S. (59, 99). — Light curve of S Ar» 

 (Chandler 6429), 2 S. — Variable star R Cen- 

 tauri, 3 S. — Secular variat. in the period of 

 R Carinffi, 5 S. («1, 1901). —The relat. exist- 

 ing betw. the light changes & the orbital Cle- 

 ments of a close binary System, with spe- 

 cial reference to the figure & density of the va- 

 riable Star RR Centauri, 22 S. (63, 02/03). — 

 Further note on the density & prolateness of 

 close binary stars, 5 S. (65, 04/05). — A meth. 

 of determining the absolute dimensions of an 

 Algol variable star, 18 S. — On cert. anomalies 

 observed in radial velocity curves, 6 S. (66, 

 05/06). 



South Afrlcan Phil. Soc. Trans.: Variat. of 

 L 6887 (R Arae), 4 S. — Central path of solar 

 eclipses visible in South Africa as total or an- 

 nular eclipses during the twentieth Century, 

 17 S. (8, 1896). — Variat. of the star C. P. D. 



— 41 0-4511, 7 S. (14, 1903—04). 



IV Roberts, Isaac, D. Sc. 1892 Du- 

 blin; war Präs., Astr. k Geol. Soc, 

 Liverpool; * 1829, j 1904, Juli 17, Star- 

 field, Sussex. — (Nachr. 2 S. in Lond. 

 Astr. M. N., 65, 1905, & 1 S. in Astr. N., 

 166, 1904.) 



Mehrere seiner Veröff. stammen aus d. Nachlaß 

 & sind V. seiner Witwe Dorothea R. geb. Klump- 

 ke hrsggeb. worden. 



Chicago, Astrophys. Journ.: Herschel's ne- 

 bulous regions, 5 S. (17, 1903). 



London, Astron. Soc. Month. Not.: William 

 Herschel's observed nebulous regions, compa- 

 red with Isaac Roberts' photographs, 9 S. 



— Nebula h 2302 N. G. C. 7822 Cassiopeise, 2 S. 

 (63, 1902/03). — The nebula H. I. 159 Cassio- 

 peia^, 9 S. (72, 11/12). —Nebula H. V. 16 Andro- 

 medse, 7 S. — Nebula H. I. 159 Cassiopeise, 

 3 S. (73, 12/13). — The nebula H. IV. 69 Tauri, 

 N. G. C. 1514 & the fainter nebulae, N. G. 

 C.821— 2655— 2782— 2787— 2830— 2859— 2880, 

 HS.— The nebula H. V. 25 Ceti, 9 S. (74, 14). 



— The nebula H. V. 20 Ceti, 10 S. — Observat. 

 of occultations of stars by the moon, & par- 

 tial eclipse of the sun, made at the Roy. Obs., 

 Greenwich, in the year 1914, 3 S. (75, 15). — 

 The nebula H IL 78 Leonis, 7 S. (76, 16). 



Paris, Acad. C. R.: Une Atolle peut-etre ap- 

 parue au ciel depuis 1892, 3 S. (173, 1921). 



IV Roberts, Ealph A.; engl. Mathe- 

 matiker. 



A new geometry for beginners, theoretical & 

 practical, 88 S., Glasgow & Dublin 1903. — 

 Preliminary geometry, Glasgow & Dublin 04. 



Amer. Journ. of Math.: Properties of the 

 plane cubic curve in relat. to the circular points 

 at infinity, 26 S. (24, 1902). 



Quart. Journ. of pure a. appl. Math.: On foci 

 & confocal plane curves, 87 S. (35, 1904). — 

 Cert. confocal Systems of curves of the third & 

 fourth class cutting orthogonally, 9 S. (36, 05). 



"v Roberts, Samuel; war 1886 Präs. 

 d. Math. Soc; * 1827, t 1913, Sept. 18, 

 London. — (Nachr. 3 S. in Lond. R. 

 S. Proc, 1913.) 



IV Roberts, William Kalph Westrop; 

 Mitgl., Trinity-Coll., Dublin; * 1850, 

 Mai 6, Dublin. 



Dublin, Ir. Acad. Proc: Properties of a 

 quintic curve, 12 S. — Bicursal curves, 6 S. (24, 

 1902 — 04). — Simbolical expression of elimi- 

 nants, 7 S. (28, 10). 



Robertson, T. Brailsford; Prof., 

 Chemie, Univ., Toronto, Ontario, Ca- 

 nada. 



The physical chemistry of the proteins, 15 -I- 

 483 S., New York 1918. — Dasselbe in deut. 

 Übers, v. F. A. Wyncken, 447 S., Dresden 12. 

 Journ. of phys. Chemistry BancroTt: The 

 rate of solut. of casein in soluts. of the hydr- 

 oxidcs of the alkalios & of the alkaline earths, 

 16 S. — Studies in electrochemistry of the 

 proteins. I: The dissooiat. of potassium ca- 



