Milk - from the cow via the milking machine to the schoolchild via the milkman.
Title reads: "British Instructional Films ltd. presents a classroom film - Modern Dairy".
Begins with shots of cows grazing in a field and chewing the cud. They walk to the milking shed. Shots of the cows in stalls where a woman hoses down their udders before attaching milking machines.
C/U of the automatic milking machines in action then a C/U of a man milking cow by hand. Milk is poured into churns outside the dairy. Man rolls a churn along the ground. Woman uses a ladle to fill a bottle with milk. Intertitle: "The milk is tested for purity before it is accepted by the dairy".
Woman enters a laboratory - chemical testing equipment. Woman siphons off small amounts of milk. She writes results of tests on a piece of paper and writes "passed". Milk is poured from churns into a large pasteurising machine. Intertitle reads: "The milk is pasteurised and filtered before being bottled". C/U shots of the machinery used in the pasteurising process. Milk bottles being filled by machine. Two men putting bottles into the machine for lining up.
Full bottles are taken off the machine and placed into crates. Men carry crates and load up a small motorised milk float with the following painted on the side: "The best milk always - Hornby & Clarke - the name that signifies service".
A milkman steers the float and walks along the road with the float behind him. (It is not a sit-in milk float but it seems to have some kind of motor). The milkman unloads crates of milk outside a school. Interior school classroom where children share out the milk, prise the lids off, put straws in the bottles and drink the milk (nice shots). End title reads: "The End - a Pathe BIF film".
Note: sound track missing.