in respect of these acts as a result of SS. 38A 2 and 54 of the Act, COUNCIL
already quoted.
Their Lordships are further of opinion that S. 86 (3) of the Act applies to the present case. No direct authority on the point was cited at the hearing, but in Nuttall v. Hargreaves 1 the Court of Appeal had to consider the effect of disconformity between the provisional and the complete specifications under the United Kingdom Act of 1883, and Lindley L.J. expressed himself as follows: "It is not necessary, as we know, in a provisional specification to describe how the invention is to be carried out, but it is necessary to comply with S. 5, sub-s. 3, of the Act of 1883, which says that
' A provisional specification must describe the nature of the invention, and be accompanied by drawings, if required.' One point which we have to consider I will deal with at once, namely, what is the consequence now, under this Act of 1883, of not describing in the provisional specification the true nature of the invention, and what is the consequence of describing it for the first time in the complete specification ? In order to answer that question we must look at further sections of the Act, and the important one, passing by S. 14 is S. 26, sub-s. 3. Section 26 relates to revocation, and it says
(1) the proceeding by scire facias to repeal a patent is hereby abolished`; (2) revocation of a patent may be obtained on petition to the Court (3) every ground on which a patent might, at the commencement of this Act, be repealed by scire facias shall be available by way of defence to an action of infringement and shall also be a ground of revocation.' To give effect to that section, it is necessary to consider what was, before the Act, the effect of a patentee not stating in his provisional specification the real nature of his invention, SO as to identify it with the invention which he described in his complete specification. The answer to that has been settled by authority, and the last case of any importance was Bailey v. Roberton (2), in the House of Lords. If the invention described in the two specifications is not the same the patent is bad. The patentee need not, as I have already pointed out, go into details in the provisional specification; it is sufficient to describe the nature of the invention, but the nature of the invention there described must be the nature of the same invention as that to which the complete specification relates. In the face, therefore, of that 26th section, it appears to me that if those two specifications properly construed are not for the same invention, the patent cannot be upheld, and that is the view taken by Lord Halsbury in the case of