1. Plantiffs. All joint promisees must join, sec 814. Otherwise when they are several,.

Sec 815

Question one of construction and parol explanation, sec 816.

Plaintiffs cannot sue both jointly and severally, sec 817.

All partners should join, sec 818.

Qualification as to one of several contractors suing contractually, sec 819.

On death of joint promisee debt survives, sec 820.

One joint promisee may release, sec 821.

Non-joinder of plaintiffs unless amended is fatal, sec 822.

Unamended misjoinder of plaintiffs is fatal if inconsistent with cause of action, sec 823.

2. Defendants.

Joint defendants must be sued jointly, sec 824.

Debts may be joint or several, sec 825.

Question is one of construction, sec 826.

Debt due on its face from two or more debtors is joint, sec 827.

Otherwise if debt is payable individually, sec 828.

Debtors may make themselves severally liable to each of several creditors, sec 829.

Liability of partners is joint and several, sec 830.

Release of one joint debtor releases all, sec 831.

Each joint debtor liable for the whole, but on death liability pursues survivors, sec 832.

Omission of joint promisor only matter for plea in abatement, sec 833.

Misjoinder if unamended is fatal, sec 834.

Joint debtor paying more than his share may recover from others, sec 835.