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1
Chemical handicraft: a classified and descriptive catalogue ...
The gas-delivery tube c, g, contains one or two caoutchouc tubes, upon which
are placed a Mohr's pinchcock d (No. 2692), and a clamp or pinchcock e (No.
2871). When the bottle is supplied with acid, and the piuchcocks are both open,
the ...
John Joseph Griffin, Cole Collection of Chemistry, 1866
2
Analyses of the Waters of the Hot Springs of Arkansas
A pinchcock for closing the rubber between a and 6 is also needed. The
apparatus thus arranged is made ready for a determination by filling the flask B
somewhat more than half full of boiled, distilled water and removing the flask A by
slipping ...
John Kerfoot Haywood, 1912
To generate sulphuretted hydrogen with this apparatus, we may observe that if
the tubes by which the bottle A communicates to the bottle B are full of liquid, it
will merely be necessary to open the screw pinchcock D, which will remove the ...
4
The Chemical News and Journal of Industrial Science; with ...
In this case, the pinchcock is put on at g, and the vapours are allowed to escape
by a b cd until only about 10 c.c. of liquid remain in the flask. Then the flame is
withdrawn, a pinchcock is fixed at c, and the tube cd is filled with water. If a
bubble ...
Sir William Crookes, 1774
5
Chemical News and Journal of Industrial Science
In this case, the pinchcock is put on at g, and the vapours are allowed to escape
by a b c d until only about 10 c.c. of liquid remain in the flask. Then the flame is
withdrawn, a pinchcock is fixed at c, and the tube frfis filled with water. If a bubble
...
6
Methods in Agricultural Chemical Analysis: A Practical Handbook
Place 0.2 g compost, milled to 0.75 mm (approximately 24 or 25 mesh) into a
sintered glass filter funnel (Porosity 3, 16-40 pm) fitted with a rubber tube with a
pinchcock. Using a measuring cylinder or dispenser, add 25 ml hydrochloric acid,
...
7
Electrophoresis in Practice
Before filling, the valve in the connecting channel between the reservoir and the
mixing chamber as well as the pinchcock are shut. Multiple discontinuous SDS
polyacrylamide gels The difference of the pore sizes between stacking and ...
8
Young Scientist Series ICSE Biology 7
Open pinchcock and exhale through B Open pinchcock and inhale through A b)
Is there a difference in moisture content of inhaled and exhaled air? Carefully
hold the dry cobalt chloride paper with forceps. Be careful not to touch it with your
...
Bhattacharya Dr. Shakuntala
9
Handbook On Herbal Products (Medicines, Cosmetics, ...
Attach a pinchcock. Slurry 30g of cellulose powder (Whatman Column Chromeda
CF1 1) in 200 ml of 10% ammonium sulfate solution. With the pinchcock open,
pour the slurry into the tube. Allow it to drain to the surface of the cellulose.
10
Proteomics in Practice: A Guide to Successful Experimental ...
Start the magnetic stirrer. . Open the pinchcock clamp to the next setting, the one
next to close the tubing completely. The light solution should start to flow down
the tubing. . Open the sliding valve of the gradient maker. Now dense solution will
...
Reiner Westermeier, Tom Naven, Hans-Rudolf Höpker, 2008
