About this time we lost the north-east trade wind, which was succeeded by calms and squalls, that detained us seven or eight days near the Line. Nothing can be experienced in a voyage much more unpleasant than this vicissitude of weather. The irksomeness of a calm near the equator is rendered almost insupportable by the ardent rays of the sun; every one seems to languish: several, and often many hours drag heavily on, while the vessel makes no progress, and only experiences a disagreeable motion by the heaving of the glassy ocean, its surface not being in the least ruffled by a breath of air. In the mean time, an elemental war is brooding. A black and pitchy cloud is seen awfully and slowly moving on, with fury in its train; all is alarm; with haste the sails are lowered. The sullen langour of the atmosphere is succeeded by the “maddening tempest,” so suddenly and with so little warning, that sometimes, before every precaution can be taken, the sweeping impetuosity lays the vessel instantaneously upon her side, and, in that situation, she is hurried forward with immense velocity. These conflicting winds are as quickly followed by solid torrents of rain. In a short period, all is tranquillity again, and the returning sun, in burning radiance, annihilates the last breeze that feebly curled the face of the ocean. The same scenes alternately present themselves. During the night these sudden squalls are the most dangerous, as their approach cannot be so well ascertained.
On the first day that we were becalmed, notwithstanding the advances we occasionally made by the transient operation of those gusts, we found our latitude 1° 43′ north, and the preceding day it was only 1° 23′. This can only be accounted for by the strong northerly currents now prevailing here; and hence it would appear, that the same invariable law of attraction governs them as well as the winds. The squalls I have mentioned also came from the south and south-east, and the winds beginning at this time to blow here, issue from the same quarter, in consequence, no doubt, of the sun being in the northern tropic. If he creates a vacuum in his vicinity by the rarefaction of the air, which induces a great influx from the southern and northern hemispheres of the atmosphere, in like manner the exuberant evaporations from the sea may produce a rushing of the waters to supply what is lost (pro tempore) by vapours. Various causes, however, operate to prevent an uniform appearance in this respect, such as the occasional counter-attraction of the moon and other celestial bodies, of continents and other lands, as well as a prevailing repulsive power in nature. Still if those effects could be minutely followed through their various ramifications, it might be found that the winds and currents originate in the combinations I have ventured to suggest. Is it not possible, that the calms near the equator at this period may arise from the equally poised contention of the south-east and north-east winds meeting, and that the former, in the sun’s march through the northern tropic, will gradually gain upon the latter in extent of dominion proportioned to the sun’s declination, and vice versa as he recedes through the southern tropic, or, more properly speaking, in the earth’s oblique revolution round the sun? The rust, which at this time constantly showed itself upon my razors, was probably owing to some peculiar corrosive properties in the atmosphere, or it might have arisen from some saline moisture insinuating itself every where imperceptibly.
But to attempt to comprehend or explain the extraordinary operations in the grand work of nature, in this and other latitudes, has in many instances baffled the keenest sagacity and most laborious research. Secondary causes of the phenomena in nature are often beyond the clearest ken of human intellect, how then are the faculties of the mind bewildered in the contemplation of the great First Cause! How lost and absorbed in adoration of the Divine source, the essence of all those wonderfully diversified appearances! The hand moves the pen with which I now write; I can trace the power that impels it—the cause of this effect, to the immediate impulse only, that is, to the muscles in the arm, that, arising thence, connect themselves with the hand. But can I go back any further? Can I ascertain what it is that produces this admirable power in the muscles, this secondary cause? Reason here discovers its confined limit as to remoter and efficient causes, but, bounding at once over these concealed regions of knowledge, sees and acknowledges the great original source of all finite existence, and in the power of thinking, and in the movement of his bodily frame, man feels that
“It is the Divinity that stirs within him.”
He has an undeniable and practical evidence of the existence, power, and goodness of an invisible and eternal Being, from whom all creation has emanated.
On the 6th of May, we crossed the Line in 23° west longitude. The calms and squalls were succeeded by cloudy weather and light breezes from the south and south-east, which in a few days assumed the steadiness of the trade wind, but not accompanied with that beautiful serenity and brightness of sky, which we experienced whilst in the north-east trade wind. Neptune and his wife Amphitrite did not make their appearance; or, to speak without mythological allusion, the usual ceremonies on crossing the Line were not observed, owing, I presume, to the fatigue and exhaustion sustained by the sailors, in consequence of the variable weather.
On Stone by C. Shoosmith from a Sketch by Jas. Henderson.
Printed by C. Hullmandel.
VIEW OF THE WESTERN SIDE OF THE BAY OF RIO DE JANEIRO, FROM THE SUGAR LOAF MOUNTAIN TO THE CITY.