Contents of History of Physics Group Newsletter
No 31 December 2013

Editorial		2
Meeting Reports
	Group AGM - Chairman's Report	3
	'Manchester 1913'	4
	ICHSTM	6
News
	International HoP Conference	9
Features
	Electron-physics Apparatus by Dennis Beard	10
	Henrietta Leavitt  by Pangratios Papacosta	13
	Newton's Second Law  by Jim Grozier	21
	Kelvin and the Age of the Earth  by E.A.Davies	34
Book Reviews
	Reminiscences by Adrian Melissonis	37
	A Palette of Particles  by Jeremy Bernstein	39
	Drive and Curiosity  by Istvan Hargittai	41
Committee and contacts		45