 ... former experiments; they were easily detached from the plumbago by the slightest touch from the point of a knife, and when collected in a white porcelain dish, they rolled about like shot, when the vessel was turned one way and another. To detach...  Annals of Philosophy - Page 3151823Full view - About this book
 | Thomas Gill (patent-agent) - 1823 - 492 pages
...about like shot, when the vessel was turned one way and another. To detach any portions of unmelted plumbago which might adhere to them, I carefully rubbed...of my hand. I then placed them upon a fragment of Wedgewood-ware floated in a dish of mercury, and slid over them a small jar of very pure oxygen gas,... | |
 | Agriculture - 1823 - 506 pages
...about like shot, when the vessel was turned one way and another. To detach any portions of untnelted plumbago which might adhere to them I carefully rubbed...between my thumb and finger in the palm of my hand. 1 then placed them upon a fragment of wedgewood ware, floated in a dish of mercury, and slid over them... | |
 | Edgar Fahs Smith - Chemists - 1917 - 540 pages
...about like shot, when the vessel was turned one way and another. To detach any portions of unmelted plumbago which might adhere to them I carefully rubbed...carbonic acid, had been fully secured by washing it with a solution of caustic soda, and by subsequently testing it with recently prepared lime-water ; the... | |
 | Academy of Natural Sciences of Philadelphia - Natural history - 1825 - 464 pages
...rays, with a lens. The following is an extract from the papers. " To detach any portion of unmelted Plumbago which might adhere to them, I carefully rubbed...between my thumb and finger, in the palm of my hand. Although they were in the focus for nearly half an hour, they did not melt, disappear, or alter their... | |
 | Physics - 1825 - 500 pages
...rays, with a lens. The following is an extract from the papers. " To. detach any portion of unmelted plumbago which might adhere to them, I carefully rubbed them between my thumb and and finger, in the palm of my hand. Although they were in the focus for nearly half an hour, they did... | |
 | Geology - 1823 - 460 pages
...turned one way and another. To detach any portions of unmelted plumbago which might adhere to them 1 carefully rubbed them between my thumb and finger in the palm of ray hand. 1 then placed them upon a fragment of wedgewood ware, floated in a dish of mercury, and slid... | |
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