PHOTOGRAPHY, C'HROMO. 



the best social, political, and literary 

 Vru. 



ain&t 



notorious at the chief ])ort 

 t'utmv no agent can di-- 

 la without giving security in ( 

 for flo.ooii, ,in<l *.~>.0(M in tlio minor ports. 

 ted iu tlio event of the. 

 clerks attempting to de- 

 tiuo. 



cliious attempt, already refer- 



naval officers who refused eo 



recognize Admiral 'l' lK 'ker, several other insur- 



niovetnents were made, but none 



.nnanciit success. Thus, on Sep- 



* 'lonel Haifa and several others 



were apprehended and imprisoned for being ac- 



enira:_ r ed in secreting arms and ammuni- 



.:id otherwise fostering a spirit of disaf- 



i which was to have culminated in agrand 



uprising-it sotne future day. In November the 



'oiied in the Chincha Islands became 



mutinous, and in the melee the captain of the 



wounded in the left side and arm, 



one of the non-commissioned officers was shot 



through the neck, and a private received a se- 



ound in the knee. At one time matters 



looked very serious, and, but for the coolness 



and good sense of Colonel Savala, who addiv-s- 



s, wonld doubtless have assumed 



very grave proportions. 



An election for President was held in Octo- 

 ber, when the dictator was chosen almost with- 

 out opposition. Of the two opposing candi- 

 . one, Colonel Bulta, was at the time a 

 or in the castle of Callao, for having 

 taken part in an insurrectionary movement; 

 and the other, General Muchuca, had for the 

 same reason been sent into Bolivia in exile. 



"te cast was very light. 

 PHOTOGRAPHY, CHVOMO. Mr. G. Whar- 

 ton Simpson, editor of The Photographic News, 

 ;Mi- !,.,! an account of an experiment in 

 '.'ranch of photographic science. Ho 

 tir-t prepared a quantity of collodio-chloridc of 

 si her, to one ounce of which ho added about 

 two grains of chloride of strontium and tour 

 grains of nitrate of silver. A plate of opal 

 glass was coated with this, dried before a lire, 

 and exposed to ditfused daylight until it became 

 of a deep lavender-gray color. When the plate 

 had assumed this tint, a piece of deep ruby 

 glass, a piece of bright orange-red glass, and a 

 piece of " patent white plate," having a small 

 quantity of concentrated solution of aniline 

 poured upon it at one end, and a similar 

 solution of aniline red poured upon it at the 

 other end, a space of clear glass remaining 

 between the two, were placed upon the plate, 

 and the whole was then exposed to stron 

 ehine. After an exposure of some ho 

 was found that the portion of the plate over 

 which the ruby glass had been placed was now 

 of a bright claret or magenta color; the portion 

 which had been covered by the orange glass 

 had assumed an orange tint ; that covered by 



I'lKKPONT, JOHN'. 



G17 



the aniline red end of the piece of white glaw, 

 of a bright orange, graduating to a deep j urplo 

 red at the place corresponding to that at which 

 the coating of aniline red had been thickest; 

 and the portion covered by the aniline ; 

 end was of a bright green, varying in depth 

 according to the variations in thickness <>: 

 coating. This experiment is satisfactory, so far 

 liowa that a layer of the violet ptib-chlo- 

 ride of stiver can be obtained simply by expo-inn 

 a layer of ordinary chloride of silver to ditfused 

 daylight for a short time. 



M. do St. Victor, in the course of his experi- 

 ments in chromo-photography, has met with a 

 curious confirmation of the theory of Ilelmholz 

 with regard to the constitution of green light. 

 Ilelmholz, in 1852, adopted the view that a 

 mixture of the blue with the yellow light of 

 the spectrum produces not green, but a pur- 

 plish-tinted white; that the red and green of 

 the spectrum produce not white, but yellow ; 

 and that a mixture of the green with the violet 

 produces a pale blue. M. de St. Victor's ex- 

 periments show that the green light of the 

 spectrum has a photographic action very differ- 

 ent from that of a mixture of its blue with its 

 yellow light. The green rays produce a green 

 image upon his sensitive plate ; but a mixture 

 of blue and yellow rays produces first a pure 

 blue image, and then a pure yellow image, but 

 never a green image, or one at all approaching 

 that color. Mr. O. N. Rood, professor of 

 physics in Columbia College, has recently de- 

 vised some ingenious spectroscope experiments, 

 which completely prove the accuracy of the 

 Ilelmholz theory. 



PIERPONT, Rev. Jomr, an American Unita- 

 rian clergyman, poet, and author, born in Litch- 

 field, Conn., April 6, 1785; died suddenly at 

 Medford, Mass., August 26, 1866. He gradu- 

 ated at Yale College, at the ape of nineteen 

 years, and soon after became private tutor in 

 the family of Colonel William Allston, in South 

 Carolina, where he remained four years. From 

 1809 to 1812 he studied law at Litchfield, and 

 having been admitted to practice at the bar of 

 Essex County, Mass., settled at Newburyport. 

 The war of 1812 interfered with his profes- 

 sional prospects, and he forsook the law for 

 business, but met with indifferent success, both 

 at Boston and Baltimore, and in 1818 ho entered 

 the Cambridge Divinity School. Less than a 

 year after this time he was installed as pastor 

 of the Hollis Street Unitarian Church at Ho.-ton, 

 succeeding Rev. Dr. Ilolley, and for twenty- 

 five years he held the pastorate of tlat drank 

 at first successful, popular, and strongly beloved 

 by his people, but the latter part of his ministry 

 was clouded with troubles and dissensions, be- 

 tween himself and prominent men of his society, 

 which were never amicably settled. These 

 grew out of his strong advocacy of the cause of 

 temperance, and also that of anti-slavery, the 

 amelioration of prison discipline, and other ro- 

 Jonns. In 1885 he visited Europe and Asi-~ 

 Having at his request obtained a dismissal from 



