This is the text of Nicholas II's abdication manifesto:
We, Nicholas II, by the Grace of God Emperor of all the Russias, Czar of Poland, Grand Duke of Finland, and etc., make known to all our faithful subjects:
In the days of the great struggle against the foreign enemies, who for nearly three years have tried to enslave our fatherland, the Lord God has been pleased to send down on Russia a new heavy trial. Internal popular disturbances threaten to have a disastrous effect on the future conduct of this persistent war. The destiny of Russia, the honor of our heroic army, the welfare of the people and the whole future of our dear fatherland demand that the war should be brought to a victorious conclusion whatever the cost. The cruel enemy is making his last efforts, and already the hour approaches when our glorious army together with our gallant allies will crush him. In these decisive days in the life of Russia, We thought it Our duty of conscience to facilitate for Our people the closest union possible and a consolidation of all national forces for the speedy attainment of victory. In agreement with the Imperial Duma We have thought it well to renounce the Throne of the Russian Empire and to lay down the supreme power. As We do not wish to part from Our beloved son, We transmit the succession to Our brother, the Grand Duke Michael Alexandrovich, and give Him Our blessing to mount the Throne of the Russian Empire. We direct Our brother to conduct the affairs of state in full and inviolable union with the representatives of the people in the legislative bodies on those principles which will be established by them, and on which He will take an inviolable oath.
In the name of Our dearly beloved homeland, We call on Our faithful sons of the fatherland to fulfill their sacred duty to the fatherland, to obey the tsar in the heavy moment of national trials, and to help Him, together with the representatives of the people, to guide the Russian Empire on the road to victory, welfare, and glory. May the Lord God help Russia!
The document was "largely prepared in advance" by a Duma committee, according to the New York Times. The abdication took place on March 15.
Grand Duke Michael, as Nicholas' heir, has also issued a manifesto, which was released by the Russian semi-official news agency.
A heavy burden has been laid on me by my brother's will in transferring to me the imperial throne of All Russia at a time of unprecedented war and unrest among the people.
Inspired by the thought common to the whole nation, that the well-being of our homeland comes above all, I have taken the hard decision to accept supreme power only in the event that it shall be the will of our great people, who in nationwide voting must elect their representatives to a Constituent Assembly, establish a new form of government and new fundamental laws for the Russian State.
Therefore, calling on God's blessing, I ask all citizens of the Russian State to obey the provisional government which has been formed and been invested with complete power on the initiative of the State Duma, until a Constituent Assembly, to be convened in the shortest possible time on the basis of general, direct, equal, secret ballot, expresses the will of the people in its decision on a form of government.
Both manifestos were republished in the New York Times.