men-ury break, o-ivin-\ sav 80 sparks i K -v minute, the striae 

 long enough for their forward • ad ' ,' kuard motion to he 

 reived aim-tly l.y the unassisted ,,ye. The appearance of the s 



ckiJ L<-tur< on Force ; bv P. G. ' 



ised. London, is to. i 



- Tait, as is stated in the preface 



only occasional changes; the somewhat familiar wav in whi 

 the principles are presented, lur.v^ > .. i- 1. no means' a defect 



andreadable. Oftlie thin, .•di'tinii ahout m 



Energy. The clear and >■. - :. i', Vroiess'nr T; 



has developed this most imp., rt.o, ■ ;, . ( i l( . i„„.k an inv 

 uahle one for all who would ». ., i. i , , r with th< pr'nwipl 



which the early history of Em-r^v i< di- -[..,,[ from the laws 

 Newton to the ex- . rim< nts ,,f Jmil, and ' -I lino-. The remainii 

 six lectures are d-vot.d ;,, H.-.dia.,,,., !,:,„ ,ii„n the >pi 



VnaiVMstlu ( Miducii noi Heat, i rhi <tnici run- . t M itt« 



These subjects are treated 



coal plants from mere fragments of leaves *< 



