The liability of the owner of a tug-boat to his tow is not that of a common carrier; 77 Pa. 238; 13 Wend. 387; 24 La. Ann. 165; 1 Black 62; 6 Cal. 462. And although the carrier receives the goods as a forwarder only, yet if his con- tract is to transport and to deliver them at a specified address, he is liable as a common carrier; 5 Am. Law Reg. N. S. 16; 48 Ν. H. 339. Common carriers are responsible for all loss or damage during transportation, from whatever cause, except the act of God or the public enemy; Ang. Carr. 70, § 67; 1 Term 27; 2 Ld. Raym. 909, 918; 1 Salk. 18 and cases cited; 25 E. L. & Eq. 595;2 Kent 597, 598; 7 Yerg. 340; 3 Munf. 239; 21 Wend. 190; 5 Strobh. 119; Rice 108; 4 Zabr. 697; 12 Conn. 410; 4 N. H. 259; 11 Ill. 579; 129 U. S. 897; 15 Minn. 279; 66 Ala. 167; 55 Тех. 323. The act of God is held to ex- tend only to such inevitable accidents as occur without the intervention of man's agency; Wood, Ry. L. 1877; 21 Wend. 192; 4 Dougl. 287; which could not be avoided by the exercise of due skill and care; 2 Watts 114; 10 Wall. 176; but where freight cars are stopped by a flood and the contents stolen, the loss is not due to inevitable acci- dent, act of God, or insurrection; 154 'Pa. See ACT OF GOD. 342. The carrier is not responsible for losses occurring from natural causes, such as frost, fermentation, evaporation, or natural decay of perishable articles, or the natural and necessary wear in the course of trans- portation, or the shipper's carelessness, provided the carrier exercises all reasonable care to have the loss or deterioration as little as practicable; Bull. N. P. 69; 2 Kent 299, 300; Story, Bailm. §492a; 6 Watts 424; Redf. Railw. § 141; 86 Me. 225; 53 Fed. Rep. 936; 21 S. W. Rep. (Tex.) 622; 28 Рас. Rep. (Or.) 894. See 115 Ill. 407; 1 L. R. A. 702. In every contract for the carriage of goods by sea, unless otherwise expressly stipulated, there is a warranty on the part of the ship- owner that the ship is seaworthy when she begins her voyage, and his undertaking is not discharged because the want of fitness is the result of latent defects; 157 U. S. 124. Carriers, both by land and water, when they undertake the general business of car- rying every kind of goods, are bound to carry for all who offer; and if they refuse, without just excuse, they are liable to an action; 4 B. & Ald. 32; 8 M. & W. 372; 1 Pick. 50; 5 Mo. 36; 15 Conn. 539; 2 Sumn. 221; 6 Railw. Cas. 61; 6 Wend. 335; 19 id. 261; 2 Story 16; 12 Mod. 484; 4 С. В. 555; L. R. 1 C. P. 423; 19 S. C. 353; 6 How. 344; 30 L. J. Q. B. 273. But the business of a common carrier may be restricted within such limits as he may deem expedient, if an individual, or which may be prescribed in its grant of powers, if a corporation, and he is not bound to accept goods out of the line of his usual business. But should the carrier accept goods not within the line of his business, he assumes the liability of a common carrier as to the specific goods ac- cepted; 23 Vt. 186; 14 Pa. 48; 10 N. H. 481; 30 Miss. 231; 4 Exch. 369; 17 Wall. 357;6 Wend. 335; 26 Vt. 248; Schouler, Bailm., 2d ed. § 372; Redf. Railw. Ca. 116. The car- rier may require freight to be paid in ad- vance; but in an action for not carrying, it is only necessary to allege a readiness to pay freight; 8 M. & W. 372; 18 III. 488; 14 Ala. N. S. 249. It is not required to prove or allege a tender, if the carrier refuse to accept the goods for transportation. The carrier is entitled to a lien upon the goods for freight; 2 Ld. Raym. 752; and for ad- vances made to other carriers; 6 Humpnr. 70; 16 Ill. 403; 16 Johns. 356; 13 B. Monr. 243. The consignor is prima facie liable for freight; but the consignee may be liable when the consignor is his agent, or when the title is in him and he accepts the goods; 3 Bingh. 383; 4 Den. 110; 3 E. D. Sm. 187; Schouler, Bailm., 2d ed. § 535. Common carriers may qualify their com- mon-law responsibility by special contract; 4 Coke 83; Ang. Carr. § 220; 1 Ventr. 238; Story, Bailm. § 549, and note 5; 17 Wall. 357; 16 Wall. 318; 63 Pa. 14; 4 Ind. App. 326. A carrier cannot exact as a condition precedent that a shipper must sign a con- tract in writing limiting the common law liability; 48 Kan. 210; 29 S. W. Rep. (Tex.) 565. A contract to qualify the common-law liability may be shown by proving a notice, brought home to and assented to by the owner of the goods or his authorized agent, wherein the carrier stipulates for a qualified liability; 8 M. & W. 243; 6 How. 344; 3 Me. 228; 11 N. Y. 491; 9 Watts 87; 8 Pa. 479; 31 id. 209; 2 Rich. 286; 12 B. Monr. 63; 23 Vt. 186; 4 Har. & J. 317. Or it may be re- duced to writing, in the form of a bill of lading. See BILL OF LADING. A contract by carrier limiting his liability for negli- gence is governed by the lex loci contractus; 148 Pa. 527. But the carrier cannot contract against his own negligence or the negligence of his employés and agents; 15 Am. Law Reg. N. s. 140; 50 Pa. 313; 1 Fed. Rep. 382; 41 Conn. 33