In the construction of this Act the words “notary public” shall be held to mean a notary public in Scotland duly admitted and practising there; the word “deed” shall be held to include any warrant or document upon which sasine may follow; and the word “lands,” or the words “heritable property,” shall be held to include houses, fishings, mills, minerals, patronages, teinds, and in general all heritable subjects or rights in which infeftment may be taken; and all words in the singular number shall be held to include a plurality of persons or things; and in general this Act shall be construed in the most liberal manner, so as to accomplish the objects thereby intended.