Yarns were spun in t he bureau's experimcntal cott on mill from I-inch and 1 h-inch staples, middling grade cotton, using single and double roving organizations. Seven counts of combed yarns (1ft-inch staple) and five counts of carded yarns (I-inch staple) were spun. Different twist factors were used for each yarn .Measurements were made of strength, diameter, angle of twist, and contraction. Correlations of t he results graphically with respect to t he twist m ult ip lier are shown and discussed. Suggestions regarding the application of t hese data t o the cotton mill are given. CONTENTS

No abstract

In considering the properties of cordage the need for physical tests other than those for breaking strength was evident. Accordingly, a study of other methods of test which would more nearly simulate service conditions was undertaken. Apparatus to test the effect of bending a rope yarn was designed and built. The yarn under tension is bent over a cross arm a certain number of oscillations per minute. An auxiliary instrument was designed which would enable the transfer of the specimen from the rope or coil to the clamps of the apparatus without changing the original twist. The variables of the apparatus were studied and a method of test formulated. CONTENTSPage

ABSTRACT.

Hair press cloth is used in the oil-pressing industries in the extraction of the oil from the pulpy matter. Hair fibers are more generally used than others on account of the resiliency required. Since the fabric is bought on a weight basis, the moisture and oil which are added to permit efficient manufacturing become important items. This paper outlines means of ascertaining the various contents. The petroleum ether extraction method is used for obtaining the oil content. The results of testing 27 samples are given. The standard percentages obtained are as follows: Moisture, n per cent; oil, 5 per cent; water-soluble material, 2% percent. CONTENTS.