Experiments Made Purpose Ascertaining Practical by House Commons (1 results)

Experiments made for the purpose of ascertaining the practical ability of superseding the necessity of employing climbing boys in the sweeping of chimneys, Copy of the report of the surveyor, general of the Board of Works, of the experiments made for the purpose of ascertaining the practicability of superseding the necessity of employing climbing boys in the sweeping of chimnies, by means of the employment of machinery