62 BULLETIN OF THE 



29th Meeting. June 15, 18T2. 



The President in the Chair, 

 Mr. A: Hall read a paper 



ON the experimental determination op the ratio op the cir- 

 cumference TO THE DIAMETER, BASED ON THE PRINCIPLES OP THB 

 CALCULUS OP PROBABILITIES. 



Mr. Theo. Gill communicated a memoir by Mr. F. B. Meek 



ON THE DISCOVERY OF NEW SPECIES OF FOSSIL PLANTS FROM ALLE- 

 GHENY CO., VA., WITH SOME REMARKS ON THE GEOLOGY OF THAT 

 STATE. 



Mr. A. Hall read a paper entitled 



A HISTORICAL NOTE ON THE METHOD OF LEAST SQUARES. 



(This communication is referred to in Nature (^London), 1872, vol. vi. 

 pp. 101 and 241.) 



Mr. 0. Stone read a memoir 



ON THE determination OF THE ERRORS OF A PROVISORY CATALOGUE 

 OF FUNDAMENTAL STARS. 



30th Meeting. June 29, 1872. 



The President in the Chair. 

 Mr. S. Newcomb made a verbal communication 



ON THE PROGRESS OP THE CONSTRUCTION OF THE NEW TELESCOPE 

 FOR THE NAVAL OBSERVATORY. 



(TAe substance of these remarks is published in Scribner^s Monthly Magazine, 

 October, 1873.) 



Mr. W. B. Taylor made some verbal comments on a recent 

 publication 



ON OUR PRESENT KNOWLEDGE OF THE PLANET JUPITER. 



