Figure for notation 181.
1 sheet
one sheet
four sheets and one loose enclosure
Reduction of the three equations
Reduction of the four equations
Notation of the reduction of the three equations. Successive reductions of three simultaneous equations in three variables to find the value of one variable
Adding apparatus description.
two sheets
1 item
‘Experiments, Practical Working etc., of J. Gray’s Patented Improvements in Steam Engines, etc.'
Notation of the reduction of the four equations. Reduction of four simultaneous equations in four variables to three simultaneous equations in three variables
three sheets
