356 Field Columbian Museum — Reports, Vol. II. 



dence, on the morning of the 22nd. Here, after working the neighbor- 

 hood of Nassau until the 26th, they chartered and commissioned a 

 38-ton schooner and made a trial run to Rose Island, returning to 

 Nassau on the 28th. At 2 :oo a. m. on the 29th the cruise began in a 

 run northward along the Berry Islands to Great Bahama, exploring 

 on the way: Whale Cay, Little Harbor Cay, Frozen Cay, Goat Cay, 

 Lignum Vitae Cay and Great Harbor Cay, reaching Great Bahama 

 Island on the third of February. Here, on account of the dangerous 

 coast, the party went into camp at Eight Mile Rock, sending the 

 vessel away to safe harbor to return on the 9th. After five days' 

 valuable collecting at this point the schooner returned and the party 

 moved to Barnett's Point, and later to Golden Grove, leaving again 

 for Nassau on the 14th. On the i6th, another start was made to the 

 southward for the purpose of exploring the Exuma Chain from Ship 

 Channel Cay to Great Exuma. Work was begun at Ship Channel 

 Cay February 17th, and continued southward along the chain, visit- 

 ing Shrouds Cay, Cave Cay, Little and Great Galiot Cays, the Cay 

 north of Wide Opening and Great Guana Cay, reaching Exuma on the 

 morning of the 23rd. Six days were spent on this interesting island, 

 and Nassau reached, at the end of the reconnoissance, on March 3rd, 

 where four days' further exploration was conducted while awaiting 

 a return steamer to New York. This trip resulted in large collections 

 of herbarium material, and a series of observations, especially in 

 phytogeography and the mutation of species, of deep interest to 

 botanical science. During April and May the Curator of Geology 

 visited points in Arizona and southern California for the purpose of 

 procuring specimens of minerals and ores not hitherto represented in 

 the Museum collections. In Yuma County, Arizona, several im- 

 portant mining districts were visited and full series of the ores and 

 rocks there to be obtained were collected. Among these districts were 

 those of Castle Dome, Picacho, La Paz, Middle Camp, Cinnabar, and 

 Kofa. In the Plumosa Mountains of Arizona specimens of a remark- 

 able and little known copper deposit were obtained, together with a 

 number of volcanic rocks. From the Santa Maria Mountains of Cali- 

 fornia were obtained specimens of new occurrences of iron ores, of 

 garnet, and of marble, also several remarkable examples of rock 

 weathering, polishing, and petrifaction. About two dozen geo- 

 logical photographs, illustrating chiefly the history of the Colorado 

 River, were also made. In San Diego, California, specimens of anew 

 occurrence of large garnet crystals, also of zoisite, pink beryl, citrine 

 quartz and precious tourmaline were obtained. Field work for the 



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