444 



Miscellaneous Intelligence. 



2. 



3. 



1. 



J. B. Lippincott & Co. — This pamplilet relates to a branch of mathemat- 

 ics upon which little has hitherto been published in this country, and 

 although the views are not new in principle, 

 ttiey are in part the result of original research 

 by the author and new in some of their applica- 

 tions. The subject is the method of construct- 

 ing curves of complex but regular figures simi- 

 lar to those in the Plant and Animal Kingdoms. 

 The plates of numerous figures at the close of 

 the pamphlet are instructive even to one who is 

 not familiar with the use of the formulas on 

 T^vhich they are constructed. The following are 

 a few examples, from the 100 figures given. 



4. 



6 



The equations for these curves are as follows. 1. 9 = ± m co53(9, (froni 

 the paper published in 1723 by Dr. Grandus, entitled ''A Collection of 

 -, 4*5 



Geometrical Flowers," Abr. Phil. Trans, vi, 67.) 2. ? 



3. e 



4-{-cos55. 4. ?=4-j-cosl0<?. 



5. p 



1 -j- '1 cos 



3 65+3_^55cos^5^ 

 rp-3 cos 



6. q 



3-2 



14-'6cos85' 



