1908 The Lancet  
72 practitioner present worked appropriately by making Tresident for the evening Dr. R. Palgrave Simpson who, after 40 years' practice in Weymouth, is shortly retiring. An excellent dinner was served and after the toast of " The King "allusicn was made to the approaching departure of Dr. Simpson and his health was enthusiastically drunk. In returning thanks the chairman recalled the fact that he was the sole surviving representative of the old local book club which was already defunct before
more » ... arrival in Weymouth -of any other medical man present. The remainder of the evening was occupied by an excellent programme of music and at the close of a very pleasant gathering the club congratulated itself on a most propitious " send-off." ROYAL MICROSCOPICAL SOCIETY.-At the Royal Microscopical Society on Dec. 18th, 1907. Mr. J. E. Barnard showed a number of luminous bacterial cultures in testtubes and flasks. He said that the bacteria were all of marine origin and that they were cultivated in an ordinary gelatine medium to which certain salts had been added. At first he used the chlorides of sodium, potassium, and magnesium in proportions resembling those in which they occurred in sea water, but he afterwards found that quite different salts, such as phosphate of sodium, were equally suitable provided the solution was isotonic to sea water. The light emitted was very nearly monochromatic, being included almost entirely between the F and 'G lines of the solar spectrum. The curve of light energy therefore rose and fell very abruptly, forming quite a contrast to the gradual rise and fall of the similar curve for sunlight. Before leaving this subject we may mention that directions for the cultivation of the'e organisms will be found in THE LANCET of Oct 13th, 1900, p. 1087. A paper by Mr. E. M. Nelson on Gregory and Wright's Microscope was read by the secretary. This microscope was made about 1786 by the firm of Gregory and Wright who were probably the successors of Benjamin Martin. It was a stage focusser and was described as an " aquatic microscope " -i.e., one in which the object-glass moved over the object instead of the object moving under the object-glass. Some of the features of Obertäuser's drum microscope, made in 1835, were described. Another paper by Mr. Nelson, also read by the secretary and entitled " A Correction for a Spectroscope," suggested that the telescope of a spectroscope should have its object-glass pivoted so that the rays emerging from the .prism might be received by it at varying angles. The secretary also read a paper entitled " Some African Rotifers," by Mr. James Murray who was at present on his way to the Antarctic regions. Mr. Eustace Large exhibited as polariscope objects a variety of sections of selenite illustrating the phenomena of 11 twinning." They were shown both in table polariscopes and under low powers of the microscope ; the vibible effects consisted of brilliantly coloured geometric patterns. __ Appointments. applicants for Vacancies. Secret a r i e s o f P u b l i c I n s t i t u t i o n s , -A Successful applicants for Vacancies, Secretaries of Public Institutions, and others possessing information suitable for this column, are invited to forward to THE LANCET office, directed to the Sub-Editor, not later than 9 o'clock on the Thursday morning of each week, such information tor gratuitoz6s publication.
doi:10.1016/s0140-6736(01)66180-4 fatcat:f7g23qxvynhzdndm55g2pxyfqe