Science/Technology
see also Communications (Telegraph, Telephone)
see also Lighting (Gas, Electric)
see also Organisations - Scientific Societies
see also Photography and Optical

futurology 
Greenwich Observatory
hair-brushing machinery 
Knight's American 
        Mechanical Dictionary 

Mesmerism
phonograph
phrenology
reprography
sewing-machines
sound recording (humour) 
a thermometer in Kensington Gdns 
vivisection 
The Wandsworth Telescope 
X-rays