Calendar: 1849-1850 Page 296

294 APPLIED SCIENCE curves on ordinary lines-and what in lines with very sharp curves 10 How is the weight of the Cranks balance 11 How is it proposed to balance the momentum of the Pistons and Connecting Rods-by Healton-by Stephenson 12 What is the advantage of the small wheels being the leading wheels 13 How is the suction pipe of the Force Pump connected with the Tender VII £ rolocjn antj fHumvilocjP What are the Physical Characters of Minerals What minerals represent the scale of hardness What is the common crystalline form of Fluor Spar and what crystals can be obtained from Fluor Spar by cleavage What are the principal characters of Calcareous Spar Primitive form Fracture Hardness Action of acids Action of Rlowpipe What minerals resemhle the Diamond and how car they be distinguished What are the materials of which the great mass of the earth's crust is made up Is there evidence of order in their arrangement and if so give some proof Are there found mixed up with the mineral substances any remains of animals and vegetables and if so mention the usual condition of such bodies Are there any marks of mechanical disturbances traceable amongst the masses of matter which form the greater pail of the earth's crust and if there are mention some of them What marks of change of other kinds not strictly mechanical can be traced in the rocks in any part of the British islands that you may be familiar with