... overcoming these difficulties; but proper materials not being obtainable in India for constructing a machine upon his new principle, ... and lasts longer, and the cotton is supplied to it more regularly than by hand, and at less cost than by manual labour. ... perfectly clear from marks until it had been placed by the person to whom it was addressed in a chemical solution. ... This was a petition of Thomas Charles Clarkson, for a prolongation of the original term of his patent of 8th February, anbsp;...
|Title||:||The Practical Mechanic's Journal|