[111] In domestic economy, the necessity of keeping copper vessels always clean is generally acknowledged; but it may not perhaps be so well known, that fat and oily substances, and vegetable acids, do not attack copper while _hot_; and, therefore, if no liquor be ever suffered to grow _cold_ in these utensils, they may be used for every culinary purpose with perfect safety.--Dr. Percival gives an account of a young lady who amused herself, while her hair was dressing, with eating samphire pickle impregnated with copper. She soon complained of pain in the stomach, and in five days vomiting commenced, which was incessant for two days. After this her stomach became prodigiously distended: and in nine days after eating the pickle, death relieved her from her sufferings. Medical Transactions, vol. iii, p. 80. [112] The materials forming nearly the whole of this Section have been selected and arranged from the _seventh_ Edition of Parkes’s _Chemical Catechism_: a work of peculiar interest, and which was confidently recommended to the Author by a physician and chemist of distinguished celebrity. [113] See Encyclopædia Britannica. * * * * * CHAPTER V. FOURTH DAY. _Section_ I.--THE SUN. Signs -- Names -- Nature -- Motions -- Form -- Magnitude -- Distance -- Suspension -- Idolatrous worship of the Sun -- The Sun an Emblem of Christ. On the _fourth day_, “God said, Let there be lights in the firmament of the heaven to divide the day from the night, and let them be for signs, and for seasons, and for days, and years: and let them be for lights in the firmament of the heaven to give light upon the earth: and it was so. And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. And God set them in the firmament of the heaven, to give light upon the earth, and to rule over the day and over the night, and to divide the light from the darkness.” The light which had hitherto been scattered and confused, was now collected and formed into several luminaries, and so rendered more glorious and of greater utility.