. The American florist : a weekly journal for the trade. Floriculture; Florists. igo4. The American Florist. 55S § 2 SS S £. «fl f ? BO ->i Wood not given Peat Lignite 4 63 78 69 13 44 2 87 Anthracite 3 81 It is clear that the percentage of car- bon increases enormously as we pass from peat to hard coal, while the gase- ous portions are gradually driven ofl. They appear mostly as water, marsh gas or fire damp, and carbonic acid gas. The percentage of ash is greatly influ- enced by foreign admixt
. The American florist : a weekly journal for the trade. Floriculture; Florists. igo4. The American Florist. 55S § 2 SS S £. «fl f ? BO ->i Wood not given Peat Lignite 4 63 78 69 13 44 2 87 Anthracite 3 81 It is clear that the percentage of car- bon increases enormously as we pass from peat to hard coal, while the gase- ous portions are gradually driven ofl. They appear mostly as water, marsh gas or fire damp, and carbonic acid gas. The percentage of ash is greatly influ- enced by foreign admixtures while the coal is being formed. or, in other words, is burned to iron oxide. Both pyrite itself and iron oxide act as powerful fluxes. The presence of iron oxide reduces the point at which the ash melts and runs together into the hard glassy mass adhering firmly to the grate bars. The inconvenience caused by these clinkers and the loss of heat due to shutting oflf the dratt need not be emphasized to any one who has handled the fire himself. Their formation is dependent upon the presence of iron oxide and this again is derived from py- rite, a compound of sulphur and iron. Coal which contains no iron will be prac- tically free from sulphur and will not clinker. Coal with much iron forms red or brown ash. The color of the ash be-. up DETAILS OF HARRY SIMPSON'S NEW GREENHOUSE page 551. During the process of formation several foreign ingredients find their way into the coal. These are admixtures probably derived from spring water and from sea- water, to whose influence the coal was subjected. We will deal here only with two of these deleterious ingredients, sulphur and iron. Sulphur is by far the most injurious substance present in coal, and the presence of iron is important because of its direct action and also because it is a practical indicator of the amount of sulphur present in coal, prac- tically all the sulphur being combined with iron as iron sulphide or
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
