§10. What is an estate at will? Are such estates common? In what case are they held to be tenancies from year to year? What if a tenant for years hold over after his lease? §11. What turns leases from uncertain terms into leases from year to year? Who is strictly a tenant at will? Can he be dispossessed without previous notice to quit? §12. What is an estate at sufferance? What are the rights of a landlord and a tenant by sufferance, respectively? Chapter LIV. §1. Define contract. What is an executory contract? An express contract? An implied contract? §2. What is a specialty? A simple or parol contract? Define _parol_. What effect has parol evidence upon written contracts? §3. Who are deemed incapable of contracting? How are contracts made by such persons voided? How enforced? What is the general rule? §4. What is the rule in regard to drunkards? §5. What is mentioned as the second requisition to a valid contract? How must assent be given? §6. What is next mentioned as necessary to a valid contract? What is a consideration? §7. What is the effect of mutual promises? How must they be made? How when the parties are distant? §8. Why are gratuitous promises void? In what case are subscriptions binding? §9. Why can not payment be lawfully claimed for gratuitous services? In what cases is a person bound to pay for unasked labor? §10. What else is mentioned as necessary to a valuable consideration? What kind of impossibility will not void a contract? §11. What is said of illegal and immoral considerations? §12. To what kind of contracts does the rule that a consideration is necessary apply? Why not to those under seal? §13. What is declared by the English statute of frauds? What do some states further require? Chapter LV. §1. What is a sale? What general principles apply to contracts of sale? §2. What if a man contracts to sell what has no existence? Give an example. §3. Can he sell what may have a future existence? Give examples. §4. What is said about _price_, as essential to a sale? §5. What about the mutual consent of parties? §6. What is to be done if the goods are not immediately delivered? Below what price is this unnecessary? What is the sum fixed in this state? §7. What is said about delivery to complete a contract? §8. When does the buyer acquire the right of property? When the right of possession? §9. In case the goods are sold on credit, when has the buyer a right to them? In what case has he not? §10. What is said about the warranty of title? §11. In regard to quality, what? §12. To what cases does not this rule apply? Is a seller bound to disclose hidden defects? §13. What is the general rule? Chapter LVI. §1. For what purposes are fraudulent sales made? §2. What is here stated to be a common law rule? Upon what question do the courts differ? §3. What distinction has been made between conditional and unconditional bills of sale and assignments?