Concrete Canoe. The Greek polymath Archimedes is said to have solved the mystery of buoyancy in a bathtub. Even if the story is apocryphal, his principle isn't: If an object weighs less than the water it displaces, it won't sink. Even concrete can float. Materials scientist Joseph-Louis Lambot built a concrete dinghy featured in the 1855 World's Fair.
Definition of BIOFILTER. : a filter bed in which sewage is subjected to the action of microorganisms that assist in decomposing it. ADVERTISEMENT. 2bi- + filter.rigin of BIOFILTER. 2bi- + filter. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.
NETFILE is an electronic tax-filing service that allows you to send your individual income tax and benefit return directly to the Canada Revenue Agency (CRA) using the Internet and a NETFILE-certified software product. It streamlines the tax-filing process and offers the following benefits:he CRA accepts responsibility for the security of information once the CRA has received it, and the CRA takes precautions to ensure the confidentiality of data sent using the NETFILE web service. Throughout the session, the CRA takes extensive measures to make sure that security is maintained.