GENERAL ORDERS, No. 100. WAR DEPARTMENT, Adjutant General's Office, Washington, August 11, 1862. 1.. Bo much of General Orders, No. 61, current series, as relates to the extension of sick leaves of absence is hereby revoked and no appli- cations for such extensions need hereafter be made. The order of the President dated July 31, [General Orders, No. 92,] fully explains what may be considered as good cause for absence. Surgeon’s certifi- cates of disability, required by existing orders and regulations, must be forwarded not only to the Adjutant General of the Army, but also to the Commander of the Kegiment, or, in case of a staff officer, to his Commanding General. 11.. 0fficers absent from duty without leave or beyond the time of their leaves, will not be allowed to draw pay until a court or commis- sion, which will be ordered on their return to their post or command, shall determine whether there was sufficient cause for their absence. They will accordingly provide themselves with a full description of the nature and cause of their disability, certified by the proper medical authority, as required by existing orders and regulations. 111.. 0fficers of volunteers who are absent from duty on account of disease contracted before they entered service, will be immediately mustered out. Those who have been absent for more than sixty days on account of wounds or disease contracted in the line of their duty, and who are still unable to return to duty, will be reported to the Adjutant General of the Army for discharge, in order that their places may be filled by others fit for field service. For this class of officers Congress has provided pensions. IV. .Applications for pensions must be made to the Commissioner of Pensions, who is the judge of the sufficiency of evidence in support of such claims, and who furnishes the forms and regulations relating thereto. V. an officer returns to his command after having overstaid his leave of absence, he may be tried by a court-martial for this as a military offence, or a commission may be appointed by the command- ing officer of his division, army corps, or army, as the case may be, to 2 investigate his case, and to determine whether or not he was absent from proper cause; and if there should be found to be such proper cause, he will be entitled to pay during such absence. The proceedings of such commission will be sent to the Adjutant General of the Army for the approval of the Secretary of War. Such commissions will consist of not less than three nor over five commissioned officers. VI. Where troops are serving in an army corps, or an army, no leaves of absence will be granted on the certificate of a regimental or brigade surgeon till the same has been approved by the medical director of such army corps or army; and no medical director will endorse any certificate until he has made a personal examination of the applicant, or received a favorable report from a medical officer appointed by him to make such personal examination. And if upon such personal examination it be found that the certificate of disability was given without proper cause, the name of the medical officer giving it will be reported to the Adjutant General of the Army, in order that he may be dismissed from the service. VII. Where officers are not serving in a division, army corps, or separate army, applications for leaves may be made to the Adjutant General of the Army; but, except in very extraordinary cases, no leave of absence will be granted unless the application bo accompanied by a certificate of the same character as that prescribed in General Orders, No. 61. VIII. In all cases of personal application for leaves of absence made to the War Department, the applicant will be examined by a medical officer assigned to that duty in this city. By order of the Secretary of War : E. D. TOWNSEND, Assistant Adjutant General.