arging end. Following the a limited extent. The gravity mixer, also of this class, mixed, the attendant operates the lever shown to the was invented by Mr. Prank B. Gilbreth some years ago trough mixer came the cube mixer, an excellent ma- right in our illustration, lowering the discharging chine… … of this type are very useful for small work, such as United Concrete-Mixing Machine Discharging United Concrete-Mixing Machine in Mixing concrete block making. a Batch of Concrete. Position. In this country a decided preference is shown for concrete mixers of the "batch" type, and this because…
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