PHILIPPINE CITRUS-FRUITS. AV 
The optical rotation is lower than that usually given for sweet 
orange oil, and yields given by Brooks” could not be equaled. 
THE MANUFACTURE OF PAPER FROM ORANGE PULP. 
With E. R. Dovey. 
Since the pulp of this orange contains so much fiber, it oc- 
curred to us that, in the event of the establishment of .a factory 
for bottling the juice, the pomace might be employed for paper 
making. The pomace was agitated with water and the seeds, 
which settled to the bottom, were readily removed. The pulp was 
then further disintegrated, a process not always necessary, and 
treated with bleaching powder. On passing through sieves of 
the proper mesh, a pulp of good character was obtained. Sheets 
of handmade paper produced from this stock were semitrans- 
parent and waterproof, and in appearance very much resembled a 
film of gelatine, although not so clear and transparent. Writing 
or printing is readily legible through the paper when placed in 
contact with it. In thin sheets the strength is very poor, and 
the paper is very brittle. Thicker sheets show-a fair strength. 
At present we do not consider the product of value; however, 
it is possible that, owing to the waterproof and semitransparent 
properties, special use might be found for this paper. The 
analysis is as follows: 
TABLE VIII.—Analysis of orange-pulp paper. 
Constituent. Per cent. 
Moisture 10.7 
Ash 3.4 
Wax (ether extract) 15.7 
Nitrogen 1.17 
Protein (N X 6.25) 7.3 
Cellulose and undetermined 62.9 
Cajel, or dalandan, is a yellow tight-skinned, sour orange, 
Citrus aurantium L., var. It is grown in Batangas Province to 
a lesser extent than the naranjita, and the remarks coneerning 
the groves of the latter apply equally well to the cajel. Analy- 
ses of different lots of juice are given in Table IX. 
“This Journal, Sec. A (1911), 6, 348. 
