"Difficultly" Quotes from Famous Books
 ... addition to carbon, are oxygen, sulphur, selenium and nitrogen. It is remarkable that sulphur can replace two methine or CH groups with the production of compounds greatly resembling, the original one. Thus benzene, (CH)6, gives thiophene, (CH)4S, from which it is difficultly distinguished; pyridine, (CH)5N, gives thiazole, (CH)3.N.S, which is a very similar substance; naphthalene gives thionaphthen, C8H6S, with which it shows great analogies, especially in the derivatives. Similarly a CH group may be replaced by a nitrogen atom with the production ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various
... in the appearance of the prints when they leave the pressure frame. Some samples of collodion cause the picture to print of a beautiful green, others of a rich brown, and some of a yellow or orange tint. The last take the longest of all to tone, and difficultly assume the tint of well toned silver prints,(15) those printing to green ...
— Photographic Reproduction Processes • P.C. Duchochois
... the inside of the sack each pass through, until the liquids on the two sides of the membrane are equally sweet. Other substances soluble in water behave similarly, but sugar and other readily crystallizable substances pass through much more readily than uncrystallizable or difficultly crystallizable. To apply this properly to the extraction of sugar, the cane is first cut into fine chips, as already described, and put into the diffusion cells, where water is applied and the ...
— Scientific American Supplement, No. 633, February 18, 1888 • Various
... evaporation over a water bath, the approximate quantity of a solution of caustic soda then added, and the whole shaken up with ether. The ethereal solution is then cooled down to a low temperature, whereby it is separated from conhydrine, which, being somewhat difficultly ...
— Scientific American Supplement, No. 315, January 14, 1882 • Various
... maxim on which the Emperor acts is, seldom to appear before the public, a maxim whose origin would be difficultly traced to any principle of affection or solicitude for his children; much more easily explained as the offspring of suspicion. The tyrant who may be conscious of having committed, or assented to, acts of cruelty and oppression, must ...
— Travels in China, Containing Descriptions, Observations, and Comparisons, Made and Collected in the Course of a Short Residence at the Imperial Palace of Yuen-Min-Yuen, and on a Subsequent Journey thr • John Barrow
... and the essential oils, which latter give the aroma of the plants, there is contained in both coffee and tea a certain amount of difficultly soluble vegetable albumen, and in the latter, especially, a large quantity of tannin. Roasting renders volatile the essential oil of the coffee-berry. The tea-leaf, infused for a short time, parts with its essential oil, and a small portion ...
— Atlantic Monthly, Volume 3, Issue 15, January, 1859 • Various
... the whole bridge level by putting the hill farther back, and pretending to have got rid of it when you have not, but have only wasted money in building an unnecessary embankment. Of course, the bridge should not be difficultly or dangerously steep, but the necessary slope, whatever it may be, should be in the bridge itself, as far as the bridge can take it, and not pushed aside into the approach, as in our Waterloo road; the only rational excuse for ...
— The Crown of Wild Olive • John Ruskin |
