52 BULLETIN 540, U. S. DEPARTMENT OF AGRICULTURE. 
LESSON 146. 
Problem.—To plan the different steps in the family washing. 
Points to be brought out.—Tuesday is the best day for washing, as 
this leaves Monday free for the mending, and gives opportunity for 
putting the clothes to soak on Monday night, if soaking is considered 
necessary. The steps in washing should be worked out in an orderly 
manner. Let each girl do her washing one week, treating it as she 
would a family washing and giving a definite reason for each step. 
Reference.—Rose, The Laundry, Cornell Reading Courses, 1 (1912), 
No. 11, p. 132. 
Correlation.—English: Describe a plan for using a town laundry by 
means of parcel post. Work out the cost of your average family 
washing, including post charges to nearest laundry. (N. B.—Some 
southern families send laundry to distant city laundries.) 
LESSON 147. 
Problem.—To make rennet custard, and look at milk and cream 
under the microscope. 
Points to be brought out.—Rennet is an enzym and acts best at the 
temperature of the body. It is killed if heated to the boiling point. 
If added to milk which has previously been heated and cooled, it 
either does not clot, or forms a curd which is less dense, according 
to the length of time the heating has been continued. On this ac- 
count, when chocolate is to be added it is better to melt it in a small 
portion of the milk and then combine with the remainder. The fat 
is present in the milk m minute droplets. Such a mixture is called 
an emulsion. 
References.—Textbook on foods; U. S. Dept. Agr., Farmers’ Bul. 
AD pe 21 
Correlation.—Physiology: Study of enzyms and the conditions 
under which they act best. 
LESSON 148. 
Problem.—To adapt the drafted pattern to the waist planned. 
Points to be brought out.—By slight changes the simple shirt waist 
draft can be adapted for use with more complicated designs. Tucks 
should be put in and allowance made for any fullness before the 
waist is cut out. Where the design is at all complicated a paper or 
cloth pattern should be cut first and tested by holding up to the 
figure. 
References.—Textbook on clothing. Handy and Pract. Farm Libr. 
[Missouri], Mo. Bul., 13 (1915), No. 2. 
Correlation.—English: Criticize the waists from the standpoint of 
artistic design. 
