Portion of paper, 'An account of the preliminary experiments and ultimate construction of a refracting telescope of 7.8 inches aperture, with a fluid concave lens' by Peter Barlow in a letter to Davies Gilbert Portion of paper beginning with the section 'Description of the Telescope Stand'. Subject: Scientific Instruments Paper published in volume 119 of Philosophical Transactions as 'An account of the preliminary experiments and ultimate construction of a refracting telescope of 7.8 inches aperture, with a fluid concave lens. In a letter addressed to Davies Gilbert, Esq. President of the Royal Society. By Peter Barlow, Esq. F. R. S. &c'. Read 18 December 1828. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 2, 1833. [1828]