PROCEEDINGS 



OF THE 



ROYAL lEISH ACADEMY. 



S CIEUfCE. 



Vol. III., Ser. 11.] DECEMBER, 1881. [No. 



CONTENTS. 



' PACK 



LXII. — On Halos and Anthelia. , Bj' Philip BrRToif, 403 



LXIII. — Abnormalities in Human Myology. By J. F. Knoit, f.k.cs.i., 407 

 LSIV. — Preliminary Note on the Plane Bepresentation of Certain Prob- 

 lems in the Dynamics of a Bigid Body. By Bobert S. Ball, 

 LL.D., E.K.S., 428 



LXY. — On nomographic Screw Systems. By Egbert S. Ball, ll.d., 



r.E.s., , 435 



LXYI. — Report on the Clearing of Peaty "Waters. (Parti.) By Gteeeaed 



A. ElIs^AHAN, . , 447 



LXVII . — Report on an Investigation of the Character and Chemical Con- 

 stitution of the Fibre of the Flax Plant. By F. Hodges, Fel- 

 low Inst. C.F.C.S. (Berlin), Zurich. With Plates XIV. & XV., 460 

 LXVIII. — The Instruments in the Old Observatory at Peking. By J. L. E. 



Deeyee, M.A., 468 



LXIX. — Preliminary Report on Soundings taken in Lough GiU, Sligo. 



By Edw. T. HAiUDMAif, f.c.s,, &c., H. M. Geological Siuvey, . 473 

 LXX. — Rejjort on the Rocks of the Fintona and Curlew Mountain Dis- 

 tricts. By G. H. KixAHAK", M.E.I. A. ; with Pateontological 

 Remarks by W. H. Baily, f.g.s. With Plates XVI. & XVIL, 475 

 LXXI. — Preliminary Report on the Embryology of the Mammalian Mus- 

 cular System. By B. C. A. Windle, b.a., , 501 



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