1834 Capped Bust Half Dollars

Design Type 8 1832-1834 Design Type 9 1834 and Design Type 10 1834-1836

Mintage: 6,412,004 (Edgar Souders notes that this figure likely exceeds 8,000,000 with nearly a quarter of 1834 dated halves being minted in 1835)

Overton Numbers and Rarities:
O-101 (R1)
O-102 (R1)
O-103 (R2)
O-104 (R2)
O-105 (R1)
O-106 (R1)
O-107 (R1)
O-108 (R2) 
O-109 (R1)
O-110 (R3)
O-111 (R1)
O-112 (R3)
O-113 (R1)
O-114 (R1)
O-115 (R2) O-115a (R4)
O-116 (R1)
O-117 (R2)
O-118 (R4)
O-119 (R4)
O-120 (R4)
O-121 (R3)
O-122 (R7) Crushed Lettered Edge (Proof Only)

Redbook Varieties:
1834, Large Date and Letters
1834, Large Date, Small Letters
1834, Small Date, Stars, Letters

O-101 thru O-103
O-104 thru O-108
O-109 thru O-121
Kneass used, in addition to the Type 8 Hub of 1832-1834, a transitional Obverse and Reverse Hub for 1834, then finally a final Obverse Hub with a smaller Miss Liberty that was used 1834-1836.

O-116, O-114, and O-113 are known as the "Abominiable Bastards". Also are referred to as Transition Hubs do to Kneass experimenting with metal flow and strike characteristics. 

O-111 is known as the "Child's Head" variety.
O-106 is the 4 over 4 variety
O-118 is the 1834 over 1834 variety

Important Historical Events of 1834

Cyrus Hall McCormick patents the reaping machine

First black to obtain a US patent, Henry Blair, for a corn planter