vi Contents. 



February 26, 1877. 



On the order in which the secreting and the conducting parts of an 

 acinous gland appear, in the individual development, and in the 

 succession of animals. By C. Creighton . . . . . 30 



March 12, 1877. 



On a paradox in the theory of attraction. By Professor J. Clerk Maxwell 34 

 On approximate multiple integration between limits by summation. By 



Professor J. Clerk Maxwell 39 



Preliminary account of an enumeration of the primes m Burckhardt's 



tables (1 to 3,000,000). By J. W. L. Glaisher .... 47 



April 23, 1877. 

 On the passage of electricity through gases. By Arthur Schuster . 57 



May 7, 1877. 



On ' expressions for the theta functions as definite integrals. By J. W. 



L. Glaisher 61 



On curvilinear and normal coordinates. By J. W. Warren ... 66 



May 21, 1877. 



On the base of the Silurian system. By Professor T. McK. Hughes . 67 



Note on the Phacopidae of the lake district. By J. E. Marr ... 68 



On some points in the history of astronomy. By Dr J. B. Pearson .. 70 



Table of exponential functions. By J. W. L. Glaisher .... 74 



October 22, 1877. 

 On the development of the vertebrate ovum. By F. M. Balfour . . 75 



October 29, 1877. 



On the metamorphism of the rocks of the Channel Islands. By 



Professor Liveing 75 



On the rocks of the Lizard district (Cornwall). By T. G. Bonuey . . 85 



November 5, 1877. 



On the unpublished electrical papers of the Hon. Henry Cavendish. 



By Professor Clerk Maxwell 86 



November 19, 1877. 



On the base of the Cambrian rocks in North Wales. By Professor 



T. McK. Hughes .89 



