Ill 
Monday , 3 d April 1871. 
On the Gravid Uterus and Arrangement of the Foetal Mem¬ 
branes in the Cetacea. By Professor Turner, 
Note on some Anomalous Spectra. By H. F. Talbot, Hon. 
F.E.S.E., ...... 
Laboratory Notes. By Professor Tait — 
1. On Anomalous Spectra, and on a simple Direct- 
vision Spectroscope, .... 
2. On a Method of illustrating to a large Audience 
the Composition of simple Harmonic Motions 
under various conditions, 
3. On a simple Mode of explaining the Optical 
Effects of Mirrors and Lenses, . 
On the Structure of the Palaeozoic Crinoids. By Professor 
Wyville Thomson, ..... 
On the Formation and Decomposition of some Chlorinated 
Acids. By J. Y. Buchanan, .... 
Monday , 17 th April 1871. 
Notes on the Antechamber of the Great Pyramid. Based 
on the Measures contained in vol. ii. “ Life and Work 
at the Pyramid,” by C. Piazzi Smyth. By Captain 
Tracey, R.A. Communicated by St John Vincent 
Day, C.E., F.R.S.E., . 
Experiments and Observations on Binocular Vision. By 
Edward Sang, Esq., . . . . . 
On the Fall of Rain at Carlisle and the neighbourhood. By 
Thomas Barnes, M.D., 
Mathematical Notes. By Professor Tait — 
1. On a Quaternion Integration, 
2. On the Ovals of Descartes, 
Monday , ls£ May 1871. 
On the remarkable Annelida of the Channel Islands, &c. 
By W. C. MTntosh, M.D., . . . . 
Note. On the Use of the Scholastic Terms Vetus Logica 
and Nova Logica , with a Remark upon the correspond¬ 
ing Terms Aniiqui and Moderni. By Thomas M. 
Lindsay, M.A., Examiner in Philosophy to the Univer¬ 
sity of Edinburgh, . 
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